knock down knock down /nɒk daʊn/

verb

1. () Cause to come or go down  ( down [Informal] , pull down , cut down , knock down , push down )
   cause to come or go down
    The policeman downed the heavily armed suspect
   The policeman downed the heavily armed suspect
    The mugger knocked down the old lady after she refused to hand over her wallet
   The mugger knocked down the old lady after she refused to hand over her wallet
   
2. () Knock down with force  ( coldcock [Informal, N. American] , deck [Informal] , dump , floor , knock down )
   knock down with force
    He decked his opponent
   He decked his opponent
   
3. Shatter as if by explosion  ( blast , knock down )
   shatter as if by explosion