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a sharp blade (= metal edge) with a handle, used for cutting or as a weapon 刀 
knives and forks 刀叉 a sharp knife 锋利的刀 a bread knife (= one for cutting bread) 切面包刀 The aim is to deter young people from carrying knives. 目的是阻止年轻人携带刀具。 He had been stabbed repeatedly with a kitchen knife. 他被菜刀反复刺伤。 a plan to tackle knife crime 对付持刀犯罪的计划 She was murdered in a frenzied knife attack. 她被乱刀残杀。
Extra ExamplesTopics Cooking and eatinga2He and his gang had a knife fight one night. 一天夜里，他和他的团伙经历了一场持刀混战。 He plunged the knife deep into her heart. 他把刀直插进她的心脏。 He pressed the knife tighter against her throat. 他把抵在她喉部的刀压得更紧了。 He suddenly pulled a knife on me. 他突然掏出刀子冲着我。 He was slumped over his desk with a knife protruding from his back. 他趴倒在书桌上，背上插着一把刀。 He waved his knife in her face threateningly. 他在她面前挥刀威胁。 She carries a knife in her bag now. 她现在包里装着刀子。 She felt a knife slice her wrist open. 她感觉到一把刀切开了自己的手腕。 She picked up her knife and fork and started to eat. 她拿起刀叉吃了起来。 She pointed her knife at Richard. 她把刀指向理查德。 She put the knife to his throat to frighten him into silence. 她用刀抵住他的喉咙，威胁他不要出声。 She stabbed him in the back with a 12-inch knife. 她用一把 12 英寸长的刀刺进他的后背。 That knife doesn't cut very well—it needs sharpening. 那把刀切东西不太快了，需要磨一磨。 The lines can be cut with a craft knife. 可以用裁纸刀裁出轮廓。 Use a sharp knife to cut away the spare dough. 用锋利的刀切掉多余的面团。 a set of kitchen knives 一套菜刀 A sharp carving knife is essential when carving any joint. 雕刻任何关节时，锋利的雕刻刀是必不可少的。 Chuck drew his hunting knife from its sheath. 查克从鞘中拔出猎刀。 Sara placed her knife and fork neatly on the plate. 萨拉把刀叉整齐地摆放在盘子上。 The raider threatened him with a 6-inch kitchen knife before escaping. 袭击者在逃跑前用一把6英寸的菜刀威胁他。 a butter/steak knife 黄油/牛排刀 - (figurative)
Each word he uttered was a knife in her heart. 他说的每个字都让她心如刀割。
Oxford Collocations Dictionaryadjective- blunt
- dull
- sharp
- …
- set
- pick up
- lay down
- put down
- …
- cut
- slice
- clatter
- …
- blade
- handle
- block
- …
- with a/the knife
- the blade of a knife
- the handle of a knife
- go under the surgeon’s knife
- …
More Like This Silent lettersSilent lettersWord Originlate Old English cnīf, from Old Norse knífr, of Germanic origin.
Idioms
the knives are out (for somebody)
the situation has become so bad that people are preparing to make one person take the blame, for example by taking away their job （对某人）磨刀霍霍，兴师问罪 The knives are out for the chancellor. 刀子是给议长的。
like a knife through butter
- (informal)
easily; without meeting any difficulty 轻而易举；毫无困难
put/stick the knife in | put/stick the knife into somebody
- (informal)
to behave towards somebody in an unfriendly way and try to harm them 对某人怀恨在心；加害于某人
turn/twist the knife (in the wound)
to say or do something unkind deliberately; to make somebody who is unhappy feel even more unhappy 恶意地说（或做）；落井下石；往伤口上撒盐 Marcia laughed as she twisted the knife still deeper. 玛西娅笑着把刀扭得更深了。 Just to twist the knife, the filmmakers have provided a surprise ending. 为了更加悲情，电影制作者早已准备好了一个令人吃惊的结局。
under the knife
- (informal)
having a medical operation 接受手术；动手术 He is to go under the surgeon's knife again on Thursday. 星期四他要再次手术。