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.