●ˌknock sb ˈout🔑1. ( ˌknock yourself ˈout) to make sb/yourself fall asleep or become unconscious使入睡；使昏迷◆The bump on the head knocked me out cold. 我头上撞了一下，晕了过去。◆He ran straight into a lamp post, knocking himself out. 他在灯柱上撞了个正着，不省人事。◆That sleeping pill knocked me out. 那片安眠药使我睡得很沉。2. (in boxing拳击) to hit an opponent so hard that they fall to the ground and cannot get up within a limited time, so losing the fight打倒（或击倒）…而获胜◆He was knocked out in the seventh round. 他在第七回合被击倒落败。3. ( ˌknock yourself ˈout) to make sb/yourself very tired, ill/sick, etc.使筋疲力尽；使病倒◆The course completely knocked me out. 这门课把我累垮了。◆She’s knocking herself out with all that work. 那么多的工作让她吃不消了。4. (informal) to surprise sb very much; to have a strong emotional effect on sb使大吃一惊；使激动◆The movie was fantastic. It knocked me out. 这部电影棒极了，着实令人震撼。SYNblow sb away (informal), bowl sb over1, 2, 3[v + n/pron + adv][v + adv + n] (less frequent) 4[v + n/pron + adv]▸ˈknockout ( ˈknock-out)
noun
1.a person, a piece of clothing, a performance, etc. that is extremely attractive or impressive引人注目（或令人印象深刻）的人（或服装、演出等）◆Her daughter’s an absolute knockout. 她的女儿绝对令人倾倒。2. (in boxing拳击) a blow that is so hard that your opponent falls to the ground and cannot get up within a limited time, so losing the fight击倒对手的一击；击倒对手获胜