English

Definition of root beer noun from the Oxford Advanced Learner's Dictionary

     

    root beer

     noun
    noun
    BrE
     
    ; NAmE
     
     
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  1. 1[uncountable, countable] a sweet fizzy drink (= with bubbles), that does not contain alcohol, made from ginger and the roots of other plants. It is drunk especially in the US.
  2. 2[countable] a bottle, can or glass of root beer Two root beers.
See the Oxford Advanced American Dictionary entry: root beer