Real Dictionary

smash
verb: If you smash something or if it smashes, it breaks into many pieces, for example when it is hit or dropped.
verb: If you smash through a wall, gate, or door, you get through it by hitting and breaking it.

smash in American English
a hard, heavy hit or blow; specif., a hard overhand stroke, as in tennis, that is difficult to return
that is a smash (sense 14)
to break into pieces
to break or shatter into pieces with noise or violence
adjective: of, relating to, or constituting a great success
intransitive verb: to break to pieces from a violent blow or collision
noun: the act or an instance of smashing or shattering
transitive verb: to break to pieces with violence and often with a crashing sound, as by striking, letting fall, or dashing against something; shatter

smash in British English
verb: to break into pieces violently and usually noisily