Dictionary.com
Thesaurus.com
Synonyms

life jacket

American  

noun

life jackets plural
  1. a sleeveless jacket of buoyant or inflatable construction, for supporting the wearer in deep water and preventing drowning.


life jacket British  

noun

  1. an inflatable sleeveless jacket worn to keep a person afloat when in danger of drowning

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Other Word Forms

Noun Inflected Forms

Etymology

Origin of life jacket

First recorded in 1865–70

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Looking like a life jacket thrown into a car compactor, the work weaves a floppy beam of hazard-orange steel around and through a menacing conglomeration of rusty metal scraps.

From The Wall Street Journal • May 22, 2026

Auctioneer Andrew Aldridge said the life jacket was an "incredibly iconic and poignant item with a superlative provenance".

From BBC • Apr. 15, 2026

She and fellow survivors, signed the life jacket, leaving their signatures on the cream-coloured vest, which features 12 pockets and is fitted with shoulder rests and side straps.

From BBC • Apr. 15, 2026

"He swam, he reckons, the first two hours with a life jacket on," Bresland told national broadcaster ABC.

From Barron's • Feb. 3, 2026

But like a darn fool I left my life jacket in the bottom of the boat, under the seat.

From "The Young Man and the Sea" by Rodman Philbrick

Vocabulary.com logo
by dictionary.com

Look it up. Learn it forever.

Remember "life jacket" for good with VocabTrainer. Expand your vocabulary effortlessly with personalized learning tools that adapt to your goals.

Take me to Vocabulary.com