Definition of bomb noun from the Oxford Advanced American Dictionary

      

    bomb

     noun
    noun
    NAmE//bɑm//
     
     
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  1. 1[countable] a weapon designed to explode at a particular time or when it is dropped or thrown a bomb attack/blast/explosion a bomb goes off/explodes extensive bomb damage Hundreds of bombs were dropped on the city. see also dirty bomb
  2. 2 the bomb [singular] nuclear weapons (atomic or hydrogen bombs) countries that have the bomb
  3. 3 a bomb [singular] (informal) a complete failure The musical was a complete bomb on Broadway.
  4. 4 [countable] (in football) a long forward throw of the ball
  5. 5 [countable] a container in which a liquid such as paint or insect poison is kept under pressure and released as a spray or as foam a bug bomb (= used for killing insects) see also cherry bomb
  6. Idioms
    be the bomb(informal)
     
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    to be very good; to be the best Check out the new Web site. It's the bomb!
See the Oxford Advanced Learner's Dictionary entry: bomb