To draw out or drain off the whole of; draw out till nothing of the matter drawn is left; remove or take out completely: as, to exhaust the water of a well, or the air from a receiver; to exhaust the contents of a mine, or of one's purse.To use up or consume completely; expend or make away with the whole of; cause the total removal or loss of: as, to exhaust the fertility of the soil; to exhaust one's strength or resources; you have exhausted my patience.To empty by drawing out the contents of; make empty by drawing from; specifically, in chem., to empty or deprive of one or more ingredients by the use of solvents: as, to exhaust a closed vessel by means of an air-pump; to exhaust a cistern.Hence To make weak or worthless by deprivation of essential properties or possessions; despoil of strength, resources, etc.; make useless or helpless: as, a man exhausted by fatigue or disease; bad husbandry exhausts the land; the long war exhausted the country.To treat or examine exhaustively; take a complete view of; consider or view in all parts, bearings, or relations: as, to exhaust a topic, a study, or a pursuit; to exhaust a book by careful reading or study.. To draw forth; excite.Expended; drained; exhausted, as of energy or strength.n. . Same as exhaust-steam.n. Eduction; emission, as of steam from an engine.n. A pump, fan, or other device for removing air from a building, enclosure, or receptacle, by lowering the pressure in the egress-pipe or flue.