bulb /bʌlb/ n. ［c］1.电灯泡：an electric bulb 电灯泡；a flash bulb 闪光灯；a neon bulb 霓虹灯 The light bulb (was) burned out. 电灯泡烧坏了。2.球状物： the bulb of the eye 眼球；the bulb of a thermometer 温度计的水银泡