Smash  —v. 1 (often foll. By up) a break into pieces; shatter. B bring or come to sudden destruction, defeat, or disaster. 2 (foll. By into, through) move with great force. 3 (foll. By in) break with a crushing blow. 4  hit (a ball etc.) With great force, esp. Downwards. —n. 1 act of smashing, collision. 2 sound of this. 3 (in full smash hit) very successful play, song, performer, etc. —adv. With a smash. [imitative]