noun · 4 senses · updated from the 2026-07-25 local source snapshot
Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.
Sound
Pronunciation
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CMU ARPABET:R EH1 S P ER0 EY2 T ER0
Digits mark lexical stress: 1 primary, 2 secondary, 0 unstressed.
1
noun
Meaning 1
A device to assist breathing.
Definition source: English Wiktionary via Wiktextract
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
2
noun
Meaning 2
A device to assist breathing.
A facemask with integrated filter(s) to keep out harmful dusts, fumes, and mists.
Definition source: English Wiktionary via Wiktextract
Qualifier: especially occupational safety and health
Examples
Any N95 respirator is designed to filter out 95 percent of particles 0.3 microns or larger.
The painters in the paint booth were wearing the kind of respirators with dual filter canisters.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
Broader terms: personal protective equipment, PPE
3
noun
Meaning 3
a protective mask with a filter; protects the face and lungs against poisonous gases
Definition source: Princeton WordNet 3.0
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: gasmask, gas helmet
Antonyms: none provided
Broader terms: mask
4
noun
Meaning 4
a breathing device for administering long-term artificial respiration
Definition source: Princeton WordNet 3.0
No example sentence was provided for this meaning.