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Definition of jack

jack

/dʒæk/
jack

Plural:jacks
•
Past Simple:jacked
•
Past Participle:jacked
•
Present Participle:jacking
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jack Lexical Profile

jack Game Scores & Validity

• noun

1

A portable mechanical or hydraulic device used for raising heavy weights, particularly motor vehicles.

Example

"I need to get the jack from the trunk before I can change this flat tire."


2

A playing card bearing the figure of a young man, ranking above a ten and below a queen.

Example

"He won the poker hand by drawing a jack on the river to complete his straight."


3

A socket or plug used to connect electronic audio, video, or networking cables.

Example

"The new smartphone model no longer includes a standard headphone jack."

Synonyms
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• verb

1

To raise or lift something heavy, typically using a mechanical or hydraulic device.

Example

"The mechanic had to jack the car to inspect the exhaust system properly."


2

To increase or raise something significantly (especially prices or rates).

Example

"The landlord decided to jack the rent by twenty percent this year."


3

American To steal or illicitly take something from someone (slang).

Example

"Someone managed to jack his bicycle while he was inside the grocery store."

Synonyms
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Antonyms
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• Rhymes for jack

Word Origin & Etymology

Derived from the Middle English personal name 'Jack' (a diminutive of John). It was historically used as a generic term for a common man or servant, which gradually transferred to various tools serving an 'assistant' role and to the subordinate face card.

Usage Trend

Historical frequency of usage in published text.

180019102020

Cite this Entry


Wordmom. (2026). Definition of Jack. In Wordmom Dictionary. Retrieved Oct 13, 2026, from https://wordmom.com/dictionary/jack
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