Source : Webster's Revised Unabridged Dictionary (1913)

Exhaust \Ex*haust"\, v. t. [imp. & p. p. {Exhausted}; p. pr. &
   vb. n. {Exhausting}.] [L. exhaustus, p. p. of exhaurire; ex
   out + haurire, haustum, to draw, esp. water; perhaps akin to
   Icel. asua to sprinkle, pump.]
   1. To draw or let out wholly; to drain off completely; as, to
      exhaust the water of a well; the moisture of the earth is
      exhausted by evaporation.

   2. To empty by drawing or letting out the contents; as, to
      exhaust a well, or a treasury.

   3. To drain, metaphorically; to use or expend wholly, or till
      the supply comes to an end; to deprive wholly of strength;
      to use up; to weary or tire out; to wear out; as, to
      exhaust one's strength, patience, or resources.

            A decrepit, exhausted old man at fifty-five.
                                                  --Motley.

   4. To bring out or develop completely; to discuss thoroughly;
      as, to exhaust a subject.

   5. (Chem.) To subject to the action of various solvents in
      order to remove all soluble substances or extractives; as,
      to exhaust a drug successively with water, alcohol, and
      ether.

   {Exhausted receiver}. (Physics) See under {Receiver}.

   Syn: To spend; consume; tire out; weary.

Source : WordNet®

exhausted
     adj 1: drained of energy or effectiveness; extremely tired;
            completely exhausted; "the day's shopping left her
            exhausted"; "he went to bed dog-tired"; "was fagged
            and sweaty"; "the trembling of his played out limbs";
            "felt completely washed-out"; "only worn-out horses
            and cattle"; "you look worn out" [syn: {dog-tired}, {fagged},
             {fatigued}, {played out}, {spent}, {washed-out}, {worn-out(a)},
             {worn out(p)}]
     2: completely emptied of resources or properties; "impossible
        to grow tobacco on the exhausted soil"; "the exhausted
        food sources"; "exhausted oil wells" [ant: {unexhausted}]
     3: drained physically; "the day's events left her completely
        exhausted--her strength drained"