1
a
: a garment for the upper body usually having a front opening, collar, lapels, sleeves, and pockets
b
: something worn or fastened around the body but not for use as clothing
2
a(1)
: the natural covering of an animal
(2)
: the fur or wool of a mammal
b
: the skin of a potato
3
: an outer covering or casing: such as
a(1)
: a thermally nonconducting cover
(2)
: a covering that encloses an intermediate space through which a temperature-controlling fluid circulates
(3)
: a tough cold-worked metal casing that forms the outer shell of a built-up bullet
b(1)
: a wrapper or open envelope for a document
(2)
: an envelope for enclosing registered mail during delivery from one post office to another
c(1)
: a detachable protective cover for a book
(2)
: a paper or cardboard envelope for a phonograph record
jacketed; jacketing; jackets
: to put a jacket on : enclose in or with a jacket
Examples of jacket in a Sentence
Noun
a suit with a double-breasted jacket
slip the art book into its jacket so it won't get dirty
Recent Examples on the Web
Beth Sobol, People.com, 12 June 2025
If the animal moves in your direction or acts aggressive, do everything to appear intimidating, including by raising your arms and opening your jacket, and speak in a firm, loud voice.
—Rachael O'Connor, MSNBC Newsweek, 12 June 2025
Corey Seymour, Vogue, 12 June 2025
Model Jacquelyn Jablonski wore a vintage Ralph Lauren jacket her mother had thrifted.
—Conçetta Ciarlo, Vogue, 24 Oct. 2024
See All Example Sentences for jacket
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Noun
To celebrate the Oilers' victory after a pivotal February 2025 game, Lauren posted a photo with the team’s wives and girlfriends wearing her custom matching jackets, according to a screenshot obtained by Sports Illustrated.
—Beth Sobol, People.com, 12 June 2025
If the animal moves in your direction or acts aggressive, do everything to appear intimidating, including by raising your arms and opening your jacket, and speak in a firm, loud voice.
—Rachael O'Connor, MSNBC Newsweek, 12 June 2025
Verb
After Cash’s Rick Rubin album, the audience—in New York, at least—was magically transformed into leather jacketed hipster boys working on starter mutton chops and Sarah Lawrence girls wearing gingham skirts and Frye boots, all of them claiming to have grown up on the stuff.
—Corey Seymour, Vogue, 12 June 2025
Model Jacquelyn Jablonski wore a vintage Ralph Lauren jacket her mother had thrifted.
—Conçetta Ciarlo, Vogue, 24 Oct. 2024
See All Example Sentences for jacket
Cite this Entry
“Jacket.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/jacket. Accessed 17 Jun. 2025.
Copy CitationMedical Definition
jacket
noun
jack·et
ˈjak-ət 
1
: a rigid covering that envelops the upper body and provides support, correction, or restraint
2
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