Definition of "Bang" :

noun: a conspicuous success

"The party went with a bang."

noun: a border of hair that is cut short and hangs across the forehead

noun: a sudden very loud noise

noun: a vigorous blow

"He got a bang on the head."

noun: the swift release of a store of affective force

"They got a great bang out of it."

verb: leap, jerk, bang

verb: strike violently

verb: close violently

verb: have sexual intercourse with

verb: move noisily

"The window banged shut."

verb: to produce a sharp often metallic explosive or percussive sound

"One of them banged the sash of the window nearest my bed."

adverb: directly

"He ran bang into the pole."