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
Also called (in Britain): respirator
WordReference Random House Learner's Dictionary of American English © 2026
ˈgas ˌmask, n. [countable]
WordReference Random House Unabridged Dictionary of American English © 2026- Chemistrya masklike device that filters air through charcoal and chemicals to protect the wearer against harmful gases.
gas′ mask′,
- Chemistry, Militarya 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.
- 1910–15
Collins Concise English Dictionary © HarperCollins Publishers::
'gas mask' also found in these entries (note: many are not synonyms or translations):