1. 消灭,杀光：keep up with 跟上,不落后 | kill off 消灭,杀光 | kind of (状语)有点儿,有几分

2. 消灭：kilim 基里姆地毯 | kill off 消灭 | kill out 灭绝

3. 消灭,杀光, 除去：kick off 踢脱(鞋子等开球, 开始;离 开,去世 | kill off 消灭,杀光, 除去 | kill time 消磨时间;消遣

4. 消灭;屠杀：rebound: v. 弹回;反弹 | kill off: 消灭;屠杀 | critically: adv. 批评地;危急地

1. - see kill 3

2. 被全部杀死；被灭绝
If you say that a group or an amount of something has been killed off, you mean that all of them or all of it have been killed or destroyed.

e.g. Their natural predators have been killed off...
它们的天敌被全部杀死。
e.g. It is an effective treatment for the bacteria and does kill it off...
这是杀菌的特效药，能将其全部消灭。

verb

1. kill en masse
kill on a large scale
kill many

e.g. Hitler wanted to exterminate the Jews, Gypsies, Communists, and homosexuals of Europe

Synonym: exterminate