/plʌg ||; plʌg/noun[C] 1 a plastic or rubber object with two or three metal pins, which connects a piece of electrical equipment to the electricity supply （将电器的导线接上电源的）插头
2 a round piece of rubber or plastic that you use to block the hole in a bath, etc （橡胶或塑料制的）塞子（如用于塞住洗涤槽、浴缸等的）
3 a mention that sb makes of a new book, film, etc in order to encourage people to buy or see it （新书、电影等的）推销广告，推介，促销