a sudden loud noise caused by something such as a gun or an object hitting a hard surface:
There was a loud bang outside the kitchen door.
a painful blow to the body when you hit against something or something hits you [= bump]:
a bang on the head
3 [plural] American EnglishDCB
hair cut straight across your forehead [= fringe British English]
in a very successful way:
Stock markets started the year with a bang.
something that gives you a good effect or a lot of value for the effort or money you spend on it:
Are taxpayers getting enough bang for their buck?
6 American English spoken
to enjoy something very much