Open English Wordnet
Verbs
(v)knock cold, knock out, kayoknock unconscious or senseless“the boxing champion knocked out his opponent in a few seconds” (v)knock outdestroy or break forcefully“The windows were knocked out” (v)knock outoverwhelm with admiration“All the guys were knocked out by her charm” (v)knock outempty (as of tobacco) by knocking out“knocked out a pipe”