open

1 of 3

adjective

ˈō-pən

-pᵊm

opener

ˈōp-nər,

ˈō-pə-

; openest

ˈōp-nəst,

ˈō-pə-

: having no enclosing or confining barrier : accessible on all or nearly all sides

cattle grazing on an open range

a(1)

: being in a position or adjustment to permit passage : not shut or locked

an open door

(2)

: having a barrier (such as a door) so adjusted as to allow passage

the house was open

: having the lips parted

stood there with his mouth wide open

: not buttoned or zipped

an open shirt

: completely free from concealment : exposed to general view or knowledge

their hostilities eventually erupted with open war

: exposed or vulnerable to attack or question : subject

open to doubt

: being an operation or surgical procedure in which an incision is made such that the tissues are fully exposed

: not covered with a top, roof, or lid

an open car

her eyes were open

: having no protective covering

open wiring

: having the skin cracked, cut, or broken so that underlying tissue is exposed

abrasions, lacerations, and other open wounds

see also open water

of large bodies of water : away from the coastal regions : pelagic

fish of the open ocean

In open seas, the smaller the ship, the more motion you can expect.

Matt Hannafin et al.

: having the parts or surfaces laid out in an expanded position : spread out : unfolded

an open book

a(1)

: low sense 15

an open vowel

(2)

: formed with the tongue in a lower position

Italian has an open and a close e

b(1)

: having clarity and resonance unimpaired by undue tension or constriction of the throat

an open vocal tone

(2)

of a tone : produced by an open string or on a wind instrument by the lip without the use of slides, valves, or keys

: available to follow or make use of

the only course open to us

: not taken up with duties or engagements

keep an hour open on Friday

: not finally decided : subject to further consideration

the salary is open

an open question

: available for a qualified applicant : vacant

the job is still open

: remaining available for use or filling until canceled

an open order for more items

: available for future purchase

these items are in open stock

: available for breeding : not now pregnant

an open heifer

computers : not proprietary : available to third party developers

But while IBM pushes Notes, a proprietary technology created in the 1980s, a raft of new and much smaller rivals is plying the "open" technology of the 1990s: software on the World Wide Web, the fastest growing part of the Internet.

Bart Ziegler

compare open-source

: characterized by ready accessibility and usually generous attitude: such as

(1)

: generous in giving

(2)

: willing to hear and consider or to accept and deal with : responsive

open to an offer

open to suggestion

(3)

: free from reserve or pretense : frank

was open about his personal life

(4)

of a relationship : not restricted to one partner at a time by mutual agreement see also open marriage

: accessible to the influx of new factors (such as foreign goods)

an open market

: having openings, interruptions, or spaces

open mesh

: such as

(1)

: being porous (see porous sense 2a) and friable

open soil

(2)

: sparsely distributed : scattered

open population

(3)

of a compound : having components (see component entry 1 sense 1) separated by a space in writing or printing (such as opaque projector)

: not made up of a continuous closed circuit (see circuit entry 1 sense 2a) of channels

the insect circulatory system is open

of an organ pipe : not stopped at the top

of a string on a musical instrument : not stopped by the finger

: being in operation

an open microphone

especially : ready for business, patronage, or use

the store is open from 9 to 5

the new highway will be open next week

a(1)

: characterized by lack of effective regulation of various commercial enterprises (see enterprise sense 2)

an open town

(2)

: not repressed (see repress sense 1) by legal controls

open gambling

: free from checking or hampering restraints

an open economy

: relatively unguarded by opponents

passed to an open teammate

: having been opened by a first ante, bet, or bid

the bidding is open

of punctuation : characterized by sparing use especially of the comma when possible without causing misinterpretation

mathematics

: containing none of its endpoints

an open interval

: being a set or composed of sets each point of which has a neighborhood all of whose points are contained in the set

the interior of a sphere is an open set

: being an incomplete electrical circuit

: not allowing the flow of electricity

an open switch

of a universe : having insufficient mass (see mass entry 2 sense 1c) to halt expansion gravitationally

open adverb

openly

ˈō-pən-lē

adverb

openness

ˈō-pə(n)-nəs How to pronounce open (audio)

noun

open

2 of 3

verb

opened ˈō-pənd How to pronounce open (audio)

ˈō-pᵊmd

; opening

ˈōp-niŋ,

ˈō-pə-

transitive verb

: to move (something, such as a door) from a closed position

: to make available for entry or passage by turning back (something, such as a barrier) or removing (something, such as a cover or an obstruction)

: to make available for or active in a regular function

open a new store

: to make accessible for a particular purpose

opened new land for settlement

: to initiate access to (a computer file) prior to use

: to disclose or expose to view : reveal

: to make more discerning or responsive : enlighten

must open our minds to the problems

: to bring into view or come in sight of by changing position

: to make an opening in

opened the boil

: to loosen and make less compact

open the soil

: to spread out : unfold

opened the book

: to enter upon : begin

opened the meeting

: to commence action in a card game by making (a first bid), putting a first bet in (the pot), or playing (a card or suit) as first lead

: to restore or recall (something, such as an order) from a finally determined state to a state in which the parties are free to prosecute or oppose

intransitive verb

: to become open

the office opened early

: to spread out : expand

the wound opened under the strain

: to become disclosed

a beautiful vista opened before us

: to become enlightened or responsive

: to give access

the rooms open onto a hall

: speak out sense 2

finally he opened freely on the subject

: to begin a course or activity

: to make a bet, bid, or lead in commencing a round or hand of a card game

: to provide the opening performance of a show before the main event

openability

ˌōp-nə-ˈbi-lə-tē

ˌō-pə-

noun

openable

ˈōp-nə-bəl

ˈō-pə-

adjective

open

3 of 3

noun

: opening

: open and unobstructed space: such as

: open air

: open water

: an open contest, competition, or tournament

: a public or unconcealed state or position

Example Sentences

Adjective The door suddenly swung open. You left the blinds wide open. The meat was roasted over an open fire. I was so tired that I couldn't keep my eyes open. Don't chew with your mouth open. staring with her eyes wide open There's already an open jar of pickles in the refrigerator. They kept the road open throughout the winter. Verb This door is hard to open. “Open the door!” shouted the police officer. Would you mind if I opened a window? The car door opened and a beautiful woman stepped out. The door opened and closed so quietly that I didn't notice he had come in the room. This drawer is stuck. It just won't open! She comes home, turns on the TV, and starts opening her mail. She opened her eyes and smiled at me. I opened my umbrella and stepped out into the rain. “Open your mouth wide for me,” said the dentist. Noun a daguerreotype of a cowboy whose face is roughened from a hard life in the open See More

Recent Examples on the Web

Adjective

This type of welcome offer is one FanDuel won’t keep open for very long.

Xl Media, cleveland, 11 Sep. 2022 Lamont said Connecticut weathered the early months of the COVID-19 crisis by keeping open manufacturers, construction work, parks, beaches and golf courses.

Stephen Singer, Hartford Courant, 11 Sep. 2022 Season 5 leaves plenty of threads open to follow in the future, and all of them are good ones.

Evan Romano, Men's Health, 11 Sep. 2022 Some Google employees say Google’s culture has grown less open.

WIRED, 11 Sep. 2022 Robinson was arrested on Nov. 23 after both women’s bodies were found in an open lot in a commercial district in Harrisonburg.

Justin Jouvenal, Washington Post, 11 Sep. 2022 With a pro-republic Labor Party government in power, Australia’s constitutional ties to the British monarchy will again be open to debate for the first time since change was rejected in a 1999 referendum.

Alicia Victoria Lozano, NBC News, 11 Sep. 2022 DeMint went on to win the open seat by nearly 10 percentage points, a margin typical in recent South Carolina statewide elections.

Meg Kinnard, BostonGlobe.com, 11 Sep. 2022 On Saturday’s no-frills, open-lit stage, Clapton served up his distinct licks and Stratocaster tones joined by a band that included several longtime accompanists.

Brian Mccollum, Detroit Free Press, 11 Sep. 2022

Verb

The team plans to open with eight different beers and will likely go up to 12, with eight core beers and four rotating seasonals.

Emma Balter, Chron, 12 Sep. 2022 Phipps Plaza owner Simon Property Group on Monday announced Hermès will open a new boutique at the posh Buckhead mall.

Zachary Hansen, ajc, 12 Sep. 2022 The full slate of River Center dining options is to open in spring 2023.

Tom Daykin, Journal Sentinel, 12 Sep. 2022 Typically the Heat talk about playing fast during the preseason, attempt to open seasons doing so, and then, invariably, the turnovers go up and the pace goes down.

Ira Winderman, Sun Sentinel, 12 Sep. 2022 Instead of going through the formulaic questioning, the queen paused and asked him to open a box on the table, Roscoe said.

Jean-nicholas Fievet, NBC News, 12 Sep. 2022 Meanwhile, Sherman and Thompson had entered into a partnership with the Minneapolis Parks and Recreation Board to open a restaurant in a new riverfront park.

Carolyn Kormann, The New Yorker, 12 Sep. 2022 Village at Prasada is a new West Valley development located at Loop 303 and Waddell Road that promises to open 700,000 square feet of shops, restaurants and entertainment in fall 2022.

Bahar Anooshahr, The Arizona Republic, 12 Sep. 2022 He is tasked with helping the company open a corporate location of the chain in Southern California and secure contracts for 19 franchise stores.

Suhauna Hussainstaff Writer, Los Angeles Times, 12 Sep. 2022

Noun

The Hargraves said that the big push right now is just to get the restaurant open, but that part of the business model with Celebrity’s is to support community organizations.

Stefene Russell, The Salt Lake Tribune, 8 Sep. 2022 Wisely, though, Lafarge leaves the central question of the novel open.

Ella Fox-martens, The Atlantic, 3 Sep. 2022 After marking each one, stitch the slotted areas in a straight vertical line, leaving the top open.

Sarah Martens, Better Homes & Gardens, 31 Aug. 2022 Plopping down on a green velvet couch and adjusting the mic stand before her, Meghan wore a brown-and-white pinstriped blouse from Anthropologie, leaving the neck tie open.

Chelsey Sanchez, Harper's BAZAAR, 23 Aug. 2022 Hinch wanted Soto to challenge Abreu, rather than pitching around him or intentionally walking him with first base open.

Evan Petzold, Detroit Free Press, 8 July 2022 Sergeant Monti ordered his men to set up a defensive post behind a rock formation, then noticed that Private First Class Brian Bradbury was injured and lying out in the open with the enemy forces advancing.

Bryan Marquard, BostonGlobe.com, 27 Aug. 2022 The family circle and gallery is set well back from the balcony line, avoiding the cavernous appearance so often noticeable from the stage, and enabling the occupants of balcony seats to fee out in the open.

San Diego Union-Tribune, 23 Aug. 2022 Fitted with electronic collars, dogs are turned loose to face off with rattlesnakes, some in cages and some slithering in the open.

Jim Carlton, WSJ, 16 Aug. 2022 See More

Phrases Containing open

Kids Definition

open 1 of 3

adjective

ˈō-pən

: not shut or blocked : not closed

an open window

open books

: not sealed, locked, or fastened

an open zipper

There's an open bottle of ketchup in the refrigerator.

: easy to enter, get through, or see

open country

: ready to consider appeals or ideas

an open mind

: not drawn together : spread out

an open flower

open umbrellas

: not enclosed or covered

an open boat

an open fire

: not secret : public

They have an open dislike for one another.

: to be used, entered, or taken part in by all

an open meeting

It was an open race—any number of dogs could be entered.

John Reynolds Gardiner, Stone Fox

: not decided or settled

an open question

open

2 of 3

verb

opened; opening

: to change or move from a shut condition

Sit down and open a book.

The door opened.

She opened her eyes.

: to clear by or as if by removing something in the way

Workers were sent to open a road blocked with snow.

: to make or become ready for use

They plan to open a store.

The office opens at eight.

: to give access

The rooms open onto a hall.

: begin sense 1, start

Police have opened an investigation.

They opened fire on the enemy.

open

3 of 3

noun

: space that is not enclosed or covered : outdoors

Some slept in a cabin while others slept in the open.

Medical Definition

open 1 of 2

adjective

ˈō-pən

a(1)

: having the skin cracked, cut, or broken so that underlying tissue is exposed

abrasions, lacerations, and other open wounds

verb

opened; opening

transitive verb

: to make available for entry or passage by removing (as a cover) or clearing away (as an obstruction)

: to free (a body passage) of congestion or occlusion

an inhalator for opening congested nasal passages

open clogged arteries

: to make one or more openings in

opened the boil

intransitive verb

: to spread out

the wound opened

Legal Definition

open 1 of 2

adjective

: exposed to general view or knowledge : free from concealment

an open, notorious, continuous, and adverse use of the property

an open and obvious danger

Note: When a defect, hazard, or condition is open such that a reasonable person under the circumstances should have recognized the danger posed by it, a defendant is usually relieved of liability for failure to warn.

: not restricted to a particular group or category of participants

specifically : enterable by a registered voter regardless of political affiliation

an open primary

: being in effect or operation

an open mine

a bench warrant still open

: available for use

an open toll road

: not finally determined, decided, or settled : subject to further consideration

an open question

: remaining effective or available for use until canceled

an open insurance contract

: not repressed or regulated by legal controls

a state with open gambling

open

2 of 2

verb

opened; opening

transitive verb

: to begin the process of

open the succession

: to make the statement by which the trial of (a case) is begun and put before the court

: to be the first to speak in summing up or arguing (a case)

: to restore or recall (as an order, rule, or judgment) from a finally determined state to a state in which the parties are free to prosecute or oppose by further proceedings

intransitive verb

: to begin action : commence on some course or activity

the stock opened at par

: to begin the trial of a case

defendant…has the option of presenting an opening statement immediately after plaintiff opens

J. H. Friedenthal et al.

单词	openly
释义	open 1 of 3 adjective ˈō-pən -pᵊm opener ˈōp-nər, ˈō-pə- ; openest ˈōp-nəst, ˈō-pə- 1 : having no enclosing or confining barrier : accessible on all or nearly all sides cattle grazing on an open range 2 a(1) : being in a position or adjustment to permit passage : not shut or locked an open door (2) : having a barrier (such as a door) so adjusted as to allow passage the house was open b : having the lips parted stood there with his mouth wide open c : not buttoned or zipped an open shirt 3 a : completely free from concealment : exposed to general view or knowledge their hostilities eventually erupted with open war b : exposed or vulnerable to attack or question : subject open to doubt c : being an operation or surgical procedure in which an incision is made such that the tissues are fully exposed 4 a : not covered with a top, roof, or lid an open car her eyes were open b : having no protective covering open wiring 5 a : having the skin cracked, cut, or broken so that underlying tissue is exposed abrasions, lacerations, and other open wounds see also open fracture b of a head injury : marked by fracture or penetration of the skull 6 : not restricted to a particular group or category of participants open to the public open housing : such as a : enterable by both amateur (see amateur sense 1) and professional (see professional entry 1 sense 2a) contestants an open tournament b : enterable by a registered voter regardless of political affiliation an open primary 7 a : presenting no obstacle to passage or view : : not enclosed, obstructed, or filled with objects the open road open country see also open water b of large bodies of water : away from the coastal regions : pelagic fish of the open ocean In open seas, the smaller the ship, the more motion you can expect. Matt Hannafin et al. 8 : having the parts or surfaces laid out in an expanded position : spread out : unfolded an open book 9 a(1) : low sense 15 an open vowel (2) : formed with the tongue in a lower position Italian has an open and a close e b(1) : having clarity and resonance unimpaired by undue tension or constriction of the throat an open vocal tone (2) of a tone : produced by an open string or on a wind instrument by the lip without the use of slides, valves, or keys 10 a : available to follow or make use of the only course open to us b : not taken up with duties or engagements keep an hour open on Friday c : not finally decided : subject to further consideration the salary is open an open question d : available for a qualified applicant : vacant the job is still open e : remaining available for use or filling until canceled an open order for more items f : available for future purchase these items are in open stock g : available for breeding : not now pregnant an open heifer h computers : not proprietary : available to third party developers But while IBM pushes Notes, a proprietary technology created in the 1980s, a raft of new and much smaller rivals is plying the "open" technology of the 1990s: software on the World Wide Web, the fastest growing part of the Internet. Bart Ziegler compare open-source 11 a : characterized by ready accessibility and usually generous attitude: such as (1) : generous in giving (2) : willing to hear and consider or to accept and deal with : responsive open to an offer open to suggestion (3) : free from reserve or pretense : frank was open about his personal life (4) of a relationship : not restricted to one partner at a time by mutual agreement see also open marriage b : accessible to the influx of new factors (such as foreign goods) an open market 12 a : having openings, interruptions, or spaces open mesh : such as (1) : being porous (see porous sense 2a) and friable open soil (2) : sparsely distributed : scattered open population (3) of a compound : having components (see component entry 1 sense 1) separated by a space in writing or printing (such as opaque projector) b : not made up of a continuous closed circuit (see circuit entry 1 sense 2a) of channels the insect circulatory system is open 13 a of an organ pipe : not stopped at the top b of a string on a musical instrument : not stopped by the finger 14 : being in operation an open microphone especially : ready for business, patronage, or use the store is open from 9 to 5 the new highway will be open next week 15 a(1) : characterized by lack of effective regulation of various commercial enterprises (see enterprise sense 2) an open town (2) : not repressed (see repress sense 1) by legal controls open gambling b : free from checking or hampering restraints an open economy c : relatively unguarded by opponents passed to an open teammate 16 : having been opened by a first ante, bet, or bid the bidding is open 17 of punctuation : characterized by sparing use especially of the comma when possible without causing misinterpretation 18 mathematics a : containing none of its endpoints an open interval b : being a set or composed of sets each point of which has a neighborhood all of whose points are contained in the set the interior of a sphere is an open set 19 a : being an incomplete electrical circuit b : not allowing the flow of electricity an open switch 20 of a universe : having insufficient mass (see mass entry 2 sense 1c) to halt expansion gravitationally open adverb openly ˈō-pən-lē adverb openness ˈō-pə(n)-nəs noun open 2 of 3 verb opened ˈō-pənd ˈō-pᵊmd ; opening ˈōp-niŋ, ˈō-pə- transitive verb 1 a : to move (something, such as a door) from a closed position b : to make available for entry or passage by turning back (something, such as a barrier) or removing (something, such as a cover or an obstruction) 2 a : to make available for or active in a regular function open a new store b : to make accessible for a particular purpose opened new land for settlement c : to initiate access to (a computer file) prior to use 3 a : to disclose or expose to view : reveal b : to make more discerning or responsive : enlighten must open our minds to the problems c : to bring into view or come in sight of by changing position 4 a : to make an opening in opened the boil b : to loosen and make less compact open the soil 5 : to spread out : unfold opened the book 6 a : to enter upon : begin opened the meeting b : to commence action in a card game by making (a first bid), putting a first bet in (the pot), or playing (a card or suit) as first lead 7 : to restore or recall (something, such as an order) from a finally determined state to a state in which the parties are free to prosecute or oppose intransitive verb 1 : to become open the office opened early 2 a : to spread out : expand the wound opened under the strain b : to become disclosed a beautiful vista opened before us 3 : to become enlightened or responsive 4 : to give access the rooms open onto a hall 5 : speak out sense 2 finally he opened freely on the subject 6 a : to begin a course or activity b : to make a bet, bid, or lead in commencing a round or hand of a card game 7 : to provide the opening performance of a show before the main event openability ˌōp-nə-ˈbi-lə-tē ˌō-pə- noun openable ˈōp-nə-bəl ˈō-pə- adjective open 3 of 3 noun 1 : opening 2 : open and unobstructed space: such as a : open air b : open water 3 : an open contest, competition, or tournament 4 : a public or unconcealed state or position Synonyms Adjective clear cleared free unclogged unclosed unobstructed unstopped Verb unclose Noun nature open air out-of-doors outdoors wild wilderness See all Synonyms & Antonyms Example Sentences Adjective The door suddenly swung open. You left the blinds wide open. The meat was roasted over an open fire. I was so tired that I couldn't keep my eyes open. Don't chew with your mouth open. staring with her eyes wide open There's already an open jar of pickles in the refrigerator. They kept the road open throughout the winter. Verb This door is hard to open. “Open the door!” shouted the police officer. Would you mind if I opened a window? The car door opened and a beautiful woman stepped out. The door opened and closed so quietly that I didn't notice he had come in the room. This drawer is stuck. It just won't open! She comes home, turns on the TV, and starts opening her mail. She opened her eyes and smiled at me. I opened my umbrella and stepped out into the rain. “Open your mouth wide for me,” said the dentist. Noun a daguerreotype of a cowboy whose face is roughened from a hard life in the open See More Recent Examples on the Web Adjective This type of welcome offer is one FanDuel won’t keep open for very long. Xl Media, cleveland, 11 Sep. 2022 Lamont said Connecticut weathered the early months of the COVID-19 crisis by keeping open manufacturers, construction work, parks, beaches and golf courses. Stephen Singer, Hartford Courant, 11 Sep. 2022 Season 5 leaves plenty of threads open to follow in the future, and all of them are good ones. Evan Romano, Men's Health, 11 Sep. 2022 Some Google employees say Google’s culture has grown less open. WIRED, 11 Sep. 2022 Robinson was arrested on Nov. 23 after both women’s bodies were found in an open lot in a commercial district in Harrisonburg. Justin Jouvenal, Washington Post, 11 Sep. 2022 With a pro-republic Labor Party government in power, Australia’s constitutional ties to the British monarchy will again be open to debate for the first time since change was rejected in a 1999 referendum. Alicia Victoria Lozano, NBC News, 11 Sep. 2022 DeMint went on to win the open seat by nearly 10 percentage points, a margin typical in recent South Carolina statewide elections. Meg Kinnard, BostonGlobe.com, 11 Sep. 2022 On Saturday’s no-frills, open-lit stage, Clapton served up his distinct licks and Stratocaster tones joined by a band that included several longtime accompanists. Brian Mccollum, Detroit Free Press, 11 Sep. 2022 Verb The team plans to open with eight different beers and will likely go up to 12, with eight core beers and four rotating seasonals. Emma Balter, Chron, 12 Sep. 2022 Phipps Plaza owner Simon Property Group on Monday announced Hermès will open a new boutique at the posh Buckhead mall. Zachary Hansen, ajc, 12 Sep. 2022 The full slate of River Center dining options is to open in spring 2023. Tom Daykin, Journal Sentinel, 12 Sep. 2022 Typically the Heat talk about playing fast during the preseason, attempt to open seasons doing so, and then, invariably, the turnovers go up and the pace goes down. Ira Winderman, Sun Sentinel, 12 Sep. 2022 Instead of going through the formulaic questioning, the queen paused and asked him to open a box on the table, Roscoe said. Jean-nicholas Fievet, NBC News, 12 Sep. 2022 Meanwhile, Sherman and Thompson had entered into a partnership with the Minneapolis Parks and Recreation Board to open a restaurant in a new riverfront park. Carolyn Kormann, The New Yorker, 12 Sep. 2022 Village at Prasada is a new West Valley development located at Loop 303 and Waddell Road that promises to open 700,000 square feet of shops, restaurants and entertainment in fall 2022. Bahar Anooshahr, The Arizona Republic, 12 Sep. 2022 He is tasked with helping the company open a corporate location of the chain in Southern California and secure contracts for 19 franchise stores. Suhauna Hussainstaff Writer, Los Angeles Times, 12 Sep. 2022 Noun The Hargraves said that the big push right now is just to get the restaurant open, but that part of the business model with Celebrity’s is to support community organizations. Stefene Russell, The Salt Lake Tribune, 8 Sep. 2022 Wisely, though, Lafarge leaves the central question of the novel open. Ella Fox-martens, The Atlantic, 3 Sep. 2022 After marking each one, stitch the slotted areas in a straight vertical line, leaving the top open. Sarah Martens, Better Homes & Gardens, 31 Aug. 2022 Plopping down on a green velvet couch and adjusting the mic stand before her, Meghan wore a brown-and-white pinstriped blouse from Anthropologie, leaving the neck tie open. Chelsey Sanchez, Harper's BAZAAR, 23 Aug. 2022 Hinch wanted Soto to challenge Abreu, rather than pitching around him or intentionally walking him with first base open. Evan Petzold, Detroit Free Press, 8 July 2022 Sergeant Monti ordered his men to set up a defensive post behind a rock formation, then noticed that Private First Class Brian Bradbury was injured and lying out in the open with the enemy forces advancing. Bryan Marquard, BostonGlobe.com, 27 Aug. 2022 The family circle and gallery is set well back from the balcony line, avoiding the cavernous appearance so often noticeable from the stage, and enabling the occupants of balcony seats to fee out in the open. San Diego Union-Tribune, 23 Aug. 2022 Fitted with electronic collars, dogs are turned loose to face off with rattlesnakes, some in cages and some slithering in the open. Jim Carlton, WSJ, 16 Aug. 2022 See More Word History Etymology Adjective, Verb, and Noun Middle English, from Old English; akin to Old High German offan open, Old English ūp up First Known Use Adjective before the 12th century, in the meaning defined at sense 1 Verb before the 12th century, in the meaning defined at transitive sense 1a Noun 13th century, in the meaning defined at sense 1 Phrases Containing open break open flip open leave/keep one's options open leave the door open for open-and-shut open a Pandora's box open arms open a can of worms open a crack open air open chain open carry open country open dating open door open doors for open enrollment open-face open fire on open-face sandwich open for discussion open for business open fracture open-hearth open-hearth process open-label open loop open marriage open market open mind open letter open mic open-minded open-mouthed open-necked open ocean open one's mind open out open question open prison open season open shop open sentence open sight open someone's eyes open-source open syllable open the door open to debate open to dispute open-toed open to question open to suggestions open up open up into open verdict open water (out) in/into the open standing/open invitation the heavens open (up) the open air the open sea with one's/both eyes open with (one's) arms wide open open admission open bar an open book open-faced sandwich open city open adoption lay oneself open open-faced open-ended open day open court open-end open one's heart open for (someone) open house on the open market open fire open-plan open to reinterpretation open one's eyes open the floodgates open-pit open one's doors open-heart with open arms open (someone or something) to (someone or something) pop open open mike open stance open sesame open-pollinated open to negotiation open sandwich open-eyed open comedo open to reason the open road wide-open open investigation open the way open one's mouth open secret keep one's eyes open See More break open flip open leave/keep one's options open leave the door open for open-and-shut open a Pandora's box open arms open a can of worms open a crack open air open chain open carry open country open dating open door open doors for open enrollment open-face open fire on open-face sandwich open for discussion open for business open fracture open-hearth open-hearth process open-label open loop open marriage open market open mind open letter open mic open-minded open-mouthed open-necked open ocean open one's mind open out open question open prison open season open shop open sentence open sight open someone's eyes open-source open syllable open the door open to debate open to dispute open-toed open to question open to suggestions open up open up into open verdict open water (out) in/into the open standing/open invitation the heavens open (up) the open air the open sea with one's/both eyes open with (one's) arms wide open open admission open bar an open book open-faced sandwich open city open adoption lay oneself open open-faced open-ended open day open court open-end open one's heart open for (someone) open house on the open market open fire open-plan open to reinterpretation open one's eyes open the floodgates open-pit open one's doors open-heart with open arms open (someone or something) to (someone or something) pop open open mike open stance open sesame open-pollinated open to negotiation open sandwich open-eyed open comedo open to reason the open road wide-open open investigation open the way open one's mouth open secret keep one's eyes open See More Kids Definition open 1 of 3 adjective ˈō-pən 1 : not shut or blocked : not closed an open window open books 2 : not sealed, locked, or fastened an open zipper There's an open bottle of ketchup in the refrigerator. 3 : easy to enter, get through, or see open country 4 : ready to consider appeals or ideas an open mind 5 : not drawn together : spread out an open flower open umbrellas 6 : not enclosed or covered an open boat an open fire 7 : not secret : public They have an open dislike for one another. 8 : to be used, entered, or taken part in by all an open meeting It was an open race—any number of dogs could be entered. John Reynolds Gardiner, Stone Fox 9 : not decided or settled an open question open 2 of 3 verb opened; opening 1 : to change or move from a shut condition Sit down and open a book. The door opened. She opened her eyes. 2 : to clear by or as if by removing something in the way Workers were sent to open a road blocked with snow. 3 : to make or become ready for use They plan to open a store. The office opens at eight. 4 : to give access The rooms open onto a hall. 5 : begin sense 1, start Police have opened an investigation. They opened fire on the enemy. open 3 of 3 noun : space that is not enclosed or covered : outdoors Some slept in a cabin while others slept in the open. Medical Definition open 1 of 2 adjective ˈō-pən 1 a(1) : having the skin cracked, cut, or broken so that underlying tissue is exposed abrasions, lacerations, and other open wounds see also open fracture (2) of a head injury : marked by fracture or penetration of the skull b : not involving or encouraging a covering (as by bandages or overgrowth of tissue) or enclosure open treatment of burns c : being an operation or surgical procedure in which an incision is made such that the tissues and organs are fully exposed compare open-heart 2 : shedding the infectious agent to the exterior open tuberculosis compare closed sense 3 3 a : unobstructed by congestion or occlusion open sinuses b : not constipated open bowels 4 : using a minimum of physical restrictions and custodial restraints on the freedom of movement of the patients or inmates an open psychiatric ward open 2 of 2 verb opened; opening transitive verb 1 a : to make available for entry or passage by removing (as a cover) or clearing away (as an obstruction) b : to free (a body passage) of congestion or occlusion an inhalator for opening congested nasal passages open clogged arteries 2 : to make one or more openings in opened the boil intransitive verb : to spread out the wound opened Legal Definition open 1 of 2 adjective 1 : exposed to general view or knowledge : free from concealment an open, notorious, continuous, and adverse use of the property an open and obvious danger Note: When a defect, hazard, or condition is open such that a reasonable person under the circumstances should have recognized the danger posed by it, a defendant is usually relieved of liability for failure to warn. 2 : not restricted to a particular group or category of participants specifically : enterable by a registered voter regardless of political affiliation an open primary 3 a : being in effect or operation an open mine a bench warrant still open b : available for use an open toll road c : not finally determined, decided, or settled : subject to further consideration an open question d : remaining effective or available for use until canceled an open insurance contract 4 : not repressed or regulated by legal controls a state with open gambling open 2 of 2 verb opened; opening transitive verb 1 : to begin the process of open the succession 2 a : to make the statement by which the trial of (a case) is begun and put before the court b : to be the first to speak in summing up or arguing (a case) 3 : to restore or recall (as an order, rule, or judgment) from a finally determined state to a state in which the parties are free to prosecute or oppose by further proceedings intransitive verb 1 : to begin action : commence on some course or activity the stock opened at par 2 : to begin the trial of a case defendant…has the option of presenting an opening statement immediately after plaintiff opens J. H. Friedenthal et al. openly adverb as in freely in a direct and honest way; without hiding feelings or opinions Please feel free to express your opinions openly. The governor has been openly critical of the President. Synonyms & Similar Words Relevance freely sincerely informally genuinely honestly candidly simply naively ingenuously guilelessly casually unpretentiously unaffectedly innocently naturally unfeignedly frankly naïvely openheartedly artlessly truly nonchalantly coolly matter-of-factly cooly unceremoniously relaxedly Antonyms & Near Antonyms falsely artfully dishonestly deceitfully furtively slyly sharply deceptively insidiously cannily cunningly craftily deviously archly slily hypocritically underhandedly underhanded calculatingly flatteringly unctuously slickly artificially insincerely pretentiously shiftily unnaturally affectedly sycophantically underhand See More
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open

adjective

verb

noun

Synonyms

Example Sentences

Word History

Phrases Containing open

Kids Definition

adjective

verb

noun

Medical Definition

adjective

verb

Legal Definition

adjective

verb

adverb