adjoin
verb
ad·join ə-ˈjȯin 
a-
adjoined; adjoining; adjoins
transitive verb
1
: to add or attach by joining
2
: to lie next to or in contact with
intransitive verb
: to be close to or in contact with one another
Synonyms
- abut
- border (on)
- butt (on or against)
- flank
- fringe
- join
- march (with)
- neighbor
- skirt
- touch
- verge (on)
See all Synonyms & Antonyms 
Example Sentences
Her office adjoins the library. The two rooms adjoin each other.
Recent Examples on the Web Outdoors, a slate patio and 10-foot-deep in-ground swimming pool adjoin a bountiful garden with Maryland champion trees, which are typically described as being among the largest of their species in the state. 
Michelle Deal-zimmerman, Baltimore Sun, 1 Sep. 2022 In such a number system, mathematicians might adjoin to the integers. Jordana Cepelewicz, Quanta Magazine, 10 Aug. 2022 Located on 1,100 acres that adjoin national forest and public land, this resort acts as a retreat into the Southwestern wilderness. Outside Online, 12 Feb. 2014 The three counties adjoin others where chronic wasting disease cases previously have been found. Lisa Hammersly, Arkansas Online, 3 Jan. 2022 Brightline has selected a route that would adjoin State Road 417 through the Hunter’s Creek community, and then run alongside Interstate 4 to a stop at Walt Disney World and a station in Tampa. Kevin Spear, orlandosentinel.com, 10 Aug. 2021 Liberty County and its county seat of Hinesville, which adjoin Fort Stewart south of Savannah, have reimposed such rules. Jeff Amy, ajc, 26 July 2021 When a new owner appears, the city will have to balance its goals of affordability, community engagement and stewardship, both of the environment and of existing neighborhoods that adjoin the campus. John Reinan, Star Tribune, 10 Apr. 2021 Nearby state parks that adjoin the Pescadero Creek Complex are reopening in different stages. Tom Stienstra, SFChronicle.com, 14 Oct. 2020 See More
Michelle Deal-zimmerman, Baltimore Sun, 1 Sep. 2022 In such a number system, mathematicians might adjoin to the integers. Jordana Cepelewicz, Quanta Magazine, 10 Aug. 2022 Located on 1,100 acres that adjoin national forest and public land, this resort acts as a retreat into the Southwestern wilderness. Outside Online, 12 Feb. 2014 The three counties adjoin others where chronic wasting disease cases previously have been found. Lisa Hammersly, Arkansas Online, 3 Jan. 2022 Brightline has selected a route that would adjoin State Road 417 through the Hunter’s Creek community, and then run alongside Interstate 4 to a stop at Walt Disney World and a station in Tampa. Kevin Spear, orlandosentinel.com, 10 Aug. 2021 Liberty County and its county seat of Hinesville, which adjoin Fort Stewart south of Savannah, have reimposed such rules. Jeff Amy, ajc, 26 July 2021 When a new owner appears, the city will have to balance its goals of affordability, community engagement and stewardship, both of the environment and of existing neighborhoods that adjoin the campus. John Reinan, Star Tribune, 10 Apr. 2021 Nearby state parks that adjoin the Pescadero Creek Complex are reopening in different stages. Tom Stienstra, SFChronicle.com, 14 Oct. 2020 See More Word History
Etymology
Middle English ajoynen, adjoynen, borrowed from Anglo-French ajoindre, going back to Latin adjungere "to link up, yoke, add, attach," from ad- ad- + jungere "to join entry 1"
First Known Use
14th century, in the meaning defined at transitive sense 1
Kids Definition
adjoin
verb
ad·join ə-ˈjȯin
adjoined; adjoining
: to be next to or in contact with
The two rooms adjoin each other.
adjoin
verb
1
as in to flank
to be adjacent to the bedroom of their apartment adjoins their neighbor's living room Synonyms & Similar Words
Relevance
- flank
- join
- surround
- abut
- touch
- neighbor
- fringe
- encircle
- enclose
- line
- skirt
- meet
- bound
- fence
- converge
- butt (on or against)
- border (on)
- march (with)
- verge (on)
- inclose
- rim
- margin
- embrace
- contact
- connect (with)
- attach (to)
- link (with)
- communicate (with)
2
as in to add
to join (something) to a mass, quantity, or number so as to bring about an overall increase after the dictionary writer's talk, the principal adjoined a few remarks about her own love of words Synonyms & Similar Words
- add
- annex
- append
- affix
- expand
- attach
- introduce
- subjoin
- augment
- fasten
- insert
- compound
- tie
- extend
- elongate
- increase
- complement
- amplify
- aggrandize
- graft
- multiply
- tack (on)
- enhance
- reinforce
- inject
- enlarge
- intensify
- protract
- tag
- escalate
- heighten
- infuse
- prolong
- lengthen
- supply
- magnify
- enforce
- maximize
- reenforce
- supplement
- strengthen
- hitch
- boost
- fix
- raise
- interfuse
- swell (up)
- beef (up)
Antonyms & Near Antonyms
- separate
- deduct
- remove
- abate
- subtract
- detach
- take off
- sever
- reduce
- cut
- unfasten
- disconnect
- diminish
- disjoin
- lessen
- bate
- lower
- knock off
- decrease
- excise
- abridge
- curtail
- abbreviate
- amputate
- lop (off)
- contract
- shorten
- constrict
- compress
- retrench
- condense
- cut back