jack

noun

/dʒæk/

Idioms

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[countable] a device for raising heavy objects off the ground, especially vehicles so that a wheel can be changedTopics Transport by car or lorryc2
[countable] an electronic connection between two pieces of electrical equipmentTopics Engineeringc2
enlarge image
[countable] (in a pack of cards) a card with a picture of a young man on it, normally worth more than a ten and less than a queen
- the jack of clubs
Wordfinder
- ace
- card
- cut
- deal
- gambling
- hand
- jack
- shuffle
- suit
- trump
[countable] (in the game of bowls) a small white ball towards which players roll larger balls
jacks
[plural] a children’s game in which players bounce a small ball and pick up small metal objects, also called jacks, before catching the ballTopics Games and toysc2
(also jack shit taboo)
[uncountable] (North American English, slang) (usually used in negative sentences) anything or nothing at all
- You don't know jack.

see also blackjack, flapjack, jumping jack, Union Jack

Word Originlate Middle English: from Jack, familiar form of the given name John. The term was used originally to denote an ordinary man, also a youth (mid 16th cent.), hence the ‘knave’ in cards and ‘male animal’. The word also denoted various devices saving human labour, as though one had a helper (sense (1), and in compounds such as jackhammer and jackknife); the general sense ‘labourer’ arose in the early 18th cent. and survives in lumberjack, steeplejack, etc. Since the mid 16th cent. a notion of ‘smallness’ has arisen, hence senses (4) and (5).

Idioms

all work and no play (makes Jack a dull boy)

(saying) it is not healthy to spend all your time working; you need to relax too

I’m all right, Jack

(British English, informal) used by or about somebody who is happy with their own life and does not care about other people’s problems

a jack of all trades

a person who can do many different types of work, but who perhaps does not do them very well

jack

verb

/dʒæk/

(North American English, informal)

Verb Forms

present simple I / you / we / they jack	/dʒæk/ /dʒæk/
he / she / it jacks	/dʒæks/ /dʒæks/
past simple jacked	/dʒækt/ /dʒækt/
past participle jacked	/dʒækt/ /dʒækt/
-ing form jacking	/ˈdʒækɪŋ/ /ˈdʒækɪŋ/

Phrasal Verbs

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jack something | jack somebody (for something) to steal something from somebody, especially something small or of low value
- Someone jacked my seat.
Word Originlate Middle English: from Jack, familiar form of the given name John. The term was used originally to denote an ordinary man, also a youth (mid 16th cent.), hence the ‘knave’ in cards and ‘male animal’. The word also denoted various devices saving human labour, as though one had a helper (sense (1), and in compounds such as jackhammer and jackknife); the general sense ‘labourer’ arose in the early 18th cent. and survives in lumberjack, steeplejack, etc. Since the mid 16th cent. a notion of ‘smallness’ has arisen, hence senses (4) and (5).

jack

adjective

/dʒæk/

[not before noun] (Australian English)

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jack of somebody/something tired of or bored with somebody/something
Word Originlate Middle English: from Jack, familiar form of the given name John. The term was used originally to denote an ordinary man, also a youth (mid 16th cent.), hence the ‘knave’ in cards and ‘male animal’. The word also denoted various devices saving human labour, as though one had a helper (sense (1), and in compounds such as jackhammer and jackknife); the general sense ‘labourer’ arose in the early 18th cent. and survives in lumberjack, steeplejack, etc. Since the mid 16th cent. a notion of ‘smallness’ has arisen, hence senses (4) and (5).

Jack

/dʒæk/

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a first name for boys, sometimes short for John

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