Related topics: Military
ˈgas mask noun [countableC]
TPMa piece of equipment worn over your face to protect you from poisonous gases 防毒面具 →5 see picture at 见图 mask1gas mask• Every child had a gas mask and a suitcase, or paper parcel.• Delaney snapped on his gas mask.• Everywhere I went, I carried the gas mask I had purchased on the black market.