v. & n.
v. 1 tr. a strike bluntly or heavily. b (often foll. by up) colloq. attack violently. c (often foll. by down, in, etc.) damage or break by striking forcibly. 2 intr. (foll. by into) collide with.
n. 1 a heavy blow. 2 sl. an attempt (had a bash at painting). 3 sl. a party or social event.
[ imit., perh. f. bang, smash, dash, etc. ]