no obj.
1- make the spontaneous sounds and movements of the face and body that are the instinctive expressions of lively amusement and sometimes also of contempt or derision笑; 嘲笑：
she couldn't help laughing at his jokes
她忍不住因为他的笑话笑出声来
he laughed out loud.
他大声笑。
1.1
laugh at
ridicule; scorn嘲笑。
1.2
laugh something off
dismiss something embarrassing, unfortunate, or potentially serious by treating it in a light-hearted way or making a joke of it一笑了之。
1.3
be laughing
informal be in a fortunate or successful position〈非正式〉幸运, 走运：if next year's model is as successful, Ford will be laughing.
如果明年的车型一样成功, 福特就走运了。
1
- an act of laughing笑：
she gave a loud, silly laugh.
她大声傻笑。
2
a laugh
informal a thing that causes laughter or derision〈非正式〉笑料; 笑柄：that's a laugh, the idea of you cooking a meal!
你要做饭, 这想法真是笑话！
2.1
- a person who is good fun or amusing company有趣的人：
I like Peter - he's a good laugh.
我喜欢彼得——他非常有趣。
2.2
- a source of fun or amusement逗人笑的事：
she decided to play along with him for a laugh
她决定和他周旋一下以逗逗趣
he knew his performance was good for a laugh.
他知道他的表演可以博得观众笑声。
短语
be laughing all the way to the bank
- informal be making a great deal of money very easily〈非正式〉发大财。
have the last laugh
- be finally vindicated, thus confounding earlier skepticism笑到最后, 最后得到证明。
he who laughs last laughs longest
- proverb don't rejoice too soon, in case your delight at your own good fortune is premature〈谚〉谁笑在最后, 谁笑得最好。
laugh one's head off
- laugh heartily or uncontrollably大笑, 狂笑不已。
laugh in someone's face
- show open contempt for someone by laughing rudely at them in their presence当面嘲笑：
figurative 〈喻〉vandals and muggers who laugh in the face of the law.
嘲笑法律的破坏公物者和抢劫犯。
the laugh is on me （或you, him等）
- the tables are turned and now the other person is the one who appears ridiculous我（你、他等）成了嘲笑对象：
all the critics had laughed at him - well, the laugh was on them now.
所有的评论员都曾嘲笑他——嘿, 可现在他们自己倒成了嘲笑对象了。
laugh like a drain
- Bri. informal laugh raucously〈英, 非正式〉大声笑。
a laugh a minute
- very funny非常滑稽：
it's a laugh a minute when Lois gets together with her dad.
洛伊斯和爸爸在一起真逗人乐。
laugh on the other side of one's face（或 〈北美〉out of the other side of one's mouth）
- be discomfited after feeling satisfaction or confidence about something转喜为悲。
laugh someone/thing out of court
- dismiss with contempt as being obviously ridiculous（因认为某人可笑而）将某人拒于门外（或置之不理）; （因认为某事荒唐可笑而）不予考虑（或置之不理）。
laugh oneself silly （或sick）
- laugh uncontrollably or for a long time笑个不停。
laugh something to scorn
- dated ridicule something〈旧〉嘲笑。
laugh up one's sleeve
- be secretly or inwardly amused窃喜, 暗笑。
no laughing matter
- something serious that should not be joked about不是闹着玩的事：
heavy snoring is no laughing matter.
严重打鼾可不是闹着玩的。
play something for laughs
- (of a performer) try to arouse laughter in an audience, especially in inappropriate circumstances（表演者, 尤指不适当地）逗笑。
词源
Old English hlæhhan, hliehhan, of Germanic origin; related to Dutch and German lachen, also to LAUGHTER.