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gas mask

American

noun

a masklike device containing or attached to a component that filters the air inhaled by the wearer through charcoal and chemicals, for protecting the face and lungs against noxious gases and fumes, as in warfare or in certain industrial processes.

gas mask British

noun

Also called (in Britain): respirator. a mask fitted with a chemical filter to enable the wearer to breathe air free of poisonous or corrosive gases: used for military or industrial purposes

"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

Etymology

Origin of gas mask

First recorded in 1910–15

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.

See Examples For:

gas mask

A bunch of grapes wears a gas mask.

From Los Angeles Times ● Jun. 19, 2026

Three-year-old Agatha Acker, in a cute gingham outfit and gas mask, brought along her doll, Betty Lou, also tricked out in a pretty dress, and a gas mask.

From Los Angeles Times ● Mar. 26, 2026

When he does fly, he carries a gas mask.

From The Wall Street Journal ● Dec. 12, 2025

"There are times I've had to have a gas mask on inside my own home," she says, demonstrating how she now wears her mask to sleep.

From BBC ● Oct. 7, 2025

There was no baggage apart from the indispensable gas mask in its haversack, and as usual Maddie wasn’t told her special passenger’s name.

From "Code Name Verity" by Elizabeth Wein

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023