Source : Webster's Revised Unabridged Dictionary (1913)

Lair \Lair\, n. [OE. leir, AS. leger; akin to D. leger, G. lager
   couch, lair, OHG. laga?, Goth. ligrs, and to E. lie. See
   {Lie} to be prostrate, and cf. {Layer}, {Leaguer}.]
   1. A place in which to lie or rest; especially, the bed or
      couch of a wild beast.

   2. A burying place. [Scot.] --Jamieson.

   3. A pasture; sometimes, food. [Obs.] --Spenser.

Source : WordNet®

lair
     n : the habitation of wild animals [syn: {den}]