respirator /'respareita(r); 'resps,retv/ n [C] apparatus for breathing through, eg by aviators at high altitudes to warm the air inhaled, by firemen, to filter the air of smoke and fumes. 呼吸保護(hù)器; 防毒罩; 呼吸器(如飛行員在高空用以提高所吸入空氣之溫度者，救火員用以過(guò)濾空氣中之煙氣者)。