The Collaborative International Dictionary of English v.0.48:

Beverage \Bev"er*age\, n. [OF. bevrage, F. breuvage, fr. beivre
   to drink, fr. L. bibere. Cf. Bib, v. t., Poison,
   Potable.]
   1. Liquid for drinking; drink; -- usually applied to drink
      artificially prepared and of an agreeable flavor; as, an
      intoxicating beverage.
      [1913 Webster]

            He knew no beverage but the flowing stream.
                                                  --Thomson.
      [1913 Webster]

   2. Specifically, a name applied to various kinds of drink.
      [1913 Webster]

   3. A treat, or drink money. [Slang]
      [1913 Webster]

WordNet (r) 3.0 (2006):

beverage
    n 1: any liquid suitable for drinking; "may I take your beverage
         order?" [syn: beverage, drink, drinkable, potable]