respirator
nounUK /ˈrɛspɪreɪtə/
US /ˈrɛspəreɪtər/
A mask you wear over your nose and mouth to help you breathe clean air.
The firefighter put on a respirator before entering the smoky building.
OTHER MEANINGS
2. A machine that helps a person breathe when they cannot breathe on their own.
The patient in the hospital was connected to a respirator.
3. A device worn over the face to protect against dust, fumes, or harmful particles.
She wore a respirator while sanding the old wooden floor.
4. A filtering mask used by divers or pilots to supply air or oxygen.
The diver checked his respirator before jumping into the water.