From WordNet (r) 2.0 (August 2003) [wn]:
lager
n 1: a camp defended by a circular formation of wagons [syn:
laager]
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
beer}]
From The Collaborative International Dictionary of English v.0.48 [gcide]:
Lager \La"ger\, n.
Lager beer.
[1913 Webster]