Definition of bang noun from the Oxford Advanced Learner's Dictionary

     

    bang

     noun
    noun
    BrE BrE//bæŋ//
     
    ; NAmE NAmE//bæŋ//
     
    Describing hair
     
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  1. 1[countable] a sudden loud noise The door swung shut with a bang. Suddenly there was a loud bang and a puff of smoke. see also Big Bang
  2. 2[countable] a sudden painful blow on a part of the body a bang on the head
  3. 3bangs [plural] (North American English) (British English fringe) the front part of somebody’s hair that is cut so that it hangs over their forehead See related entries: Describing hair
  4. 4[uncountable] = bhang
  5. 5[countable] (informal, computing) the symbol ( ! )
  6. Word Origin mid 16th cent.: imitative, perhaps of Scandinavian origin; compare with Old Norse bang ‘hammering’.Extra examples She blew her bangs out of her face. She slammed the door with a loud bang. The engine let out a bang. We suddenly heard an almighty bang from the kitchen. Will the firework make a loud enough bang?Idioms (especially North American English, informal) if you get more, better, etc. bang for your buck, you get better value for the money you spend or the effort you put in to something
    come back/down to earth (with a bang/bump), bring somebody (back) down to earth (with a bang/bump)
     
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    (informal) to return, or to make somebody return, to a normal way of thinking or behaving after a time when they have been very excited, not very practical, etc. see also down to earth
    1. 1very successfully The party went with a bang.
    2. 2in a way that everyone notices; with a powerful effect The team won their last four games, ending the season with a bang.
See the Oxford Advanced American Dictionary entry: bang