柯林斯詞典light bulb (light bulbs) 1. N-COUNT A light bulb or bulb is the round glass part of an electric light or lamp which light shines from. 燈泡 返回 light bulb劍橋詞典a rounded glass container with a thin thread of metal inside that produces light when an electric current goes through it 電燈泡 返回 light bulb