knock out

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• verb transitive To strike or bump (someone or something) out.
• verb transitive, idiomatic To render unconscious, as by a blow to the head.
• verb transitive, idiomatic To put to sleep.
• verb transitive, idiomatic To exhaust.
• verb transitive, idiomatic To complete, especially in haste; knock off.
• verb transitive, idiomatic To cause a mechanism to become non-functional by damaging or destroying it.
• verb sports To eliminate.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• verb eliminate
• verb destroy or break forcefully
• verb overwhelm with admiration
• verb knock unconscious or senseless
• verb empty (as of tobacco) by knocking out