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
CBS News, 10 Apr. 2025
Just the other day, Emily Ratajkowski was seen in New York City wearing the cropped coated denim jacket.
—Aamina Inayat Khan, StyleCaster, 10 Apr. 2025
Conçetta Ciarlo, Vogue, 24 Oct. 2024
On December 31, the 24-year-old pop star attended Kelce's game against the Cincinnati Bengals wearing a slightly different version of the Chiefs letterman jacket her boyfriend wore on Christmas Day.
—Emily Tannenbaum, Glamour, 1 Jan. 2024
See All Example Sentences for jacket
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Noun
Andrew Redington / Getty Images Scheffler, who along with his green jacket and Olympic gold medal won seven times on the PGA Tour last year, got a late start to this season after cutting himself on a wine glass in December.
—CBS News, 10 Apr. 2025
Just the other day, Emily Ratajkowski was seen in New York City wearing the cropped coated denim jacket.
—Aamina Inayat Khan, StyleCaster, 10 Apr. 2025
Verb
Model Jacquelyn Jablonski wore a vintage Ralph Lauren jacket her mother had thrifted.
—Conçetta Ciarlo, Vogue, 24 Oct. 2024
On December 31, the 24-year-old pop star attended Kelce's game against the Cincinnati Bengals wearing a slightly different version of the Chiefs letterman jacket her boyfriend wore on Christmas Day.
—Emily Tannenbaum, Glamour, 1 Jan. 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 20 Apr. 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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