American English

Definition of root beer noun from the Oxford Advanced American Dictionary

     

    root beer

     noun
    noun
     
     
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  1. 1 [uncountable] a sweet drink with bubbles that does not contain alcohol, made from ginger and the roots of other plants
  2. 2 [countable] a bottle, can, or glass of root beer Two root beers.
See the Oxford Advanced Learner's Dictionary entry: root beer