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The Collaborative International Dictionary of English v.0.48 (gcide)

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.
[1913 Webster]

2. To empty by drawing or letting out the contents; as, to
exhaust a well, or a treasury.
[1913 Webster]

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.
[1913 Webster]

A decrepit, exhausted old man at fifty-five.
--Motley.
[1913 Webster]

4. To bring out or develop completely; to discuss thoroughly;
as, to exhaust a subject.
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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.
[1913 Webster]

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

Syn: To spend; consume; tire out; weary.
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exhausted \exhausted\ adj.
1. same as {burned-out}, 1. [WordNet sense 13]

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]