The Collaborative International Dictionary of English v.0.48:

exhausted \exhausted\ adj.
   1. same as burned-out, 1. [WordNet sense 1+3]

   Syn: burned-out(prenominal), burnt-out(prenominal), burned
        out(predicate), burnt out(predicate), fagged, fatigued,
        played-out(prenominal), played out(predicate), spent,
        washed-out(prenominal), washed out(predicate),
        worn-out(prenominal), worn out(predicate).
        [WordNet 1.5]

   2. used up; completely consumed. [WordNet sense 2][Narrower
      terms: gone, expended, spent] WordNet 1.5 +PJC]

   3. emptied by being pumped out or having a vacuum created.
      Opposite of unexhausted.

   Syn: exhausted, evacuated.
        [WordNet 1.5 +PJC]