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Definition of jacket

jacket

/ˈdʒæk.ɪt/
jack · et

Plural:jackets
•
Past Simple:jacketed
•
Past Participle:jacketed
•
Present Participle:jacketing
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jacket Lexical Profile

jacket Game Scores & Validity

• noun

1

A waist- or hip-length outer garment for the upper body, typically featuring sleeves and a front fastening.

Example

"She grabbed her leather jacket before heading out into the chilly evening air."


2

A removable outer cover used to protect an object such as a book, vinyl record, or document.

Example

"The author's biography and photograph were printed on the back of the book jacket."


3

An outer casing or layer placed around a pipe, boiler, or bullet for insulation, protection, or reinforcement.

Example

"The bullet featured a copper jacket that allowed it to maintain higher velocities without deforming."

Synonyms
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• verb

1

To cover, enclose, or insulate an object with an outer casing or protective layer.

Example

"The engineers decided to jacket the pipes with fiberglass to prevent heat loss during the winter."


2

To dress someone in a jacket.

Example

"She jacketed the children warmly before sending them out to play in the snow."

Synonyms
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Antonyms
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• Rhymes for jacket

Word Origin & Etymology

From Middle French 'jaquet', a diminutive of 'jaque' (a short tunic), which is of uncertain origin, possibly derived from the proper name 'Jacques' (often used to refer to a French peasant).

Usage Trend

Historical frequency of usage in published text.

180019102020

Cite this Entry


Wordmom. (2026). Definition of Jacket. In Wordmom Dictionary. Retrieved Nov 5, 2026, from https://wordmom.com/dictionary/jacket
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