The Collaborative International Dictionary of English v.0.48:

Lager \La"ger\, n.
   Lager beer.
   [1913 Webster]

WordNet (r) 3.0 (2006):

lager
    n 1: a camp defended by a circular formation of wagons [syn:
         laager, lager]
    2: a general term for beer made with bottom fermenting yeast
       (usually by decoction mashing); originally it was brewed in
       March or April and matured until September [syn: lager,
       lager beer]