N-UNCOUNT 男士常礼服(指在婚礼等非常正式的场合穿的一套服装，通常包括灰色或黑色常燕尾服、灰色裤子、白衬衫、灰色领带和高顶礼帽) Morning dress is a suit that is worn by men for very formal occasions such as weddings. It consists of a grey or black coat that is longer at the back than the front, grey trousers, a white shirt, a grey tie, and often a top hat. 男士常礼服(指在婚礼等非常正式的场合穿的一套服装，通常包括灰色或黑色常燕尾服、灰色裤子、白衬衫、灰色领带和高顶礼帽)