- a masklike device, usually of nonwoven fibrous materials, as fiberglass paper, wool felt, or polypropylene, worn over the mouth, or nose and mouth, to prevent the inhalation of noxious substances, pathogens, or the like:Respirators are essential protective equipment for healthcare providers during an outbreak.
- ventilator (def. 3).
- gas mask.
- an apparatus for providing long-term artificial respiration
- a device worn over the mouth and nose to prevent inhalation of noxious fumes or to warm cold air before it is breathed
