transitive verb

1. to break or shatter into pieces with noise or violence
2. to hit (a tennis ball, badminton bird, etc.) with a hard overhand stroke
3. to hit with a hard, heavy blow or impact
4. to ruin completely; defeat utterly; wreck

Etymology: prob. < s-, intens. + mash

intransitive verb

1. to break into pieces
2. to be destroyed; come to ruin
3. to collide with crushing force
4. to move by smashing or with force

noun

1. a hard, heavy hit or blow; specif., a hard overhand stroke, as in tennis, that is difficult to return
2. 1. a violent, noisy breaking or shattering
   2. the sound of this
3. 1. a violent collision
   2. a wreck
4. complete ruin or defeat; total failure, esp. in business
5. an iced drink made of bruised mint leaves, sugar, soda water, and an alcoholic liquor
6. ☆ an overwhelming popular success

adjective