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
Alesandra Dubin, Travel + Leisure, 31 Oct. 2025
Target has every jacket on my wish list, including denim picks, trendy faux suede options, and classic trench coats that’ll keep me comfortable well into fall and winter.
—Jacqueline Tempera, PEOPLE, 31 Oct. 2025
Eric Twardzik, Robb Report, 13 Oct. 2025
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
See All Example Sentences for jacket
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Noun
The jersey-stitch construction gives it a smooth drape that layers easily under blazers or jackets.
—Alesandra Dubin, Travel + Leisure, 31 Oct. 2025
Target has every jacket on my wish list, including denim picks, trendy faux suede options, and classic trench coats that’ll keep me comfortable well into fall and winter.
—Jacqueline Tempera, PEOPLE, 31 Oct. 2025
Verb
Some manufacturers, notably Barbour, will re-wax customers’ jackets themselves, and independent re-waxers have sprung up to serve the same function.
—Eric Twardzik, Robb Report, 13 Oct. 2025
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
See All Example Sentences for jacket
Cite this Entry
“Jacket.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/jacket. Accessed 4 Nov. 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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