*tap² n [C] 1especially BrE something that you turn on or off in order to control the flow of water from a pipe 【尤英】 水龙头; FAUCET AmE 【美】: I turned on the cold water tap. 我打开冷水龙头。 2 when you hit something gently, especially to get someone's attention 轻敲,轻拍〔尤指为了唤起某人注意〕: Suddenly I felt a tap on my shoulder. 突然,我感到有人轻拍我的肩膀。 3 on tap available to be used 可供使用的: unlimited data on tap 可供利用的无数资料