Meaning : Eliminate.
Example :
Knock out a target.
Meaning : Knock unconscious or senseless.
Example :
The boxing champion knocked out his opponent in a few seconds.
Synonyms : kayo, knock cold
Meaning : Destroy or break forcefully.
Example :
The windows were knocked out.
Meaning : Overwhelm with admiration.
Example :
All the guys were knocked out by her charm.
Meaning : Empty (as of tobacco) by knocking out.
Example :
Knocked out a pipe.