knock out

verb

1. 1

   destroy or break forcefully

   The windows were knocked out

2. 2

   empty (as of tobacco) by knocking out

   knocked out a pipe

3. 3

   eliminate

   knock out a target

4. 4

   knock unconscious or senseless

   the boxing champion knocked out his opponent in a few seconds

5. 5

   overwhelm with admiration

   All the guys were knocked out by her charm