N-COUNT 尾;尾巴 The tail of an animal, bird, or fish is the part extending beyond the end of its body.

N-COUNT (尤指细长物体的)尾部，末端 You can use tail to refer to the end or back of something, especially something long and thin.

N-PLURAL （男子的）燕尾服，晚礼服 If a man is wearing tails, he is wearing a formal jacket which has two long pieces hanging down at the back.

VERB 跟踪;盯梢;尾随 To tail someone means to follow close behind them and watch where they go and what they do.

N-COUNT 盯梢者;跟踪者 A tail is someone who is paid to watch and to follow another person.

ADV (硬币的)反面 If you toss a coin and it comes down tails, you can see the side of it that does not have a picture of a head on it.

PHRASE 主次颠倒;喧宾夺主 If you say that the tail is wagging the dog, you mean that a small or unimportant part of something is becoming too important and is controlling the whole thing.

PHRASE （由于失败或羞愧）夹着尾巴，垂头丧气 If you say that you have your tail between your legs, you are emphasizing that you feel defeated and ashamed.

PHRASE 掉头逃跑;转身逃走 If you turn tail, you turn and run away.