1. (Physics) A kind of pump for exhausting air from a vessel or closed space; also, a pump to condense air or force it into a closed space. [ 1913 Webster ]

2. (Steam Engines) A pump used to exhaust from a condenser the condensed steam, the water used for condensing, and any commingled air. [ 1913 Webster ]

A pump consisting of an endless chain, running over a drum or wheel by which it is moved, and dipping below the water to be raised. The chain has at intervals disks or lifts which fit the tube through which the ascending part passes and carry the water to the point of discharge. [ 1913 Webster ]

(Mach.) (a) A pump having a solid piston, or plunger, for drawing and forcing a liquid, as water, through the valves; in distinction from a pump having a bucket, or valved piston. (b) A pump adapted for delivering water at a considerable height above the pump, or under a considerable pressure; in distinction from one which lifts the water only to the top of the pump or delivers it through a spout. See Illust. of Plunger pump, under Plunger. [ 1913 Webster ]

n. (Mining) The top pump in the pit. Raymond. [ 1913 Webster ]

v. i. To work, or raise water, a pump. [ 1913 Webster ]

n. [ Probably so called as being worn for pomp or ornament. See Pomp. ] A low shoe with a thin sole. Swift. [ 1913 Webster ]

n. [ Akin to D. pomp, G. pumpe, F. pompe; of unknown origin. ] An hydraulic machine, variously constructed, for raising or transferring fluids, consisting essentially of a moving piece or piston working in a hollow cylinder or other cavity, with valves properly placed for admitting or retaining the fluid as it is drawn or driven through them by the action of the piston. [ 1913 Webster ]

☞ for various kinds of pumps, see Air pump, Chain pump, and Force pump; also, under Lifting, Plunger, Rotary, etc. [ 1913 Webster ]

Circulating pump (Steam Engine), a pump for driving the condensing water through the casing, or tubes, of a surface condenser. --
Pump brake. See Pump handle, below. --
Pump dale. See Dale. --
Pump gear, the apparatus belonging to a pump. Totten. --
Pump handle, the lever, worked by hand, by which motion is given to the bucket of a pump. --
Pump hood, a semicylindrical appendage covering the upper wheel of a chain pump. --
Pump rod, the rod to which the bucket of a pump is fastened, and which is attached to the brake or handle; the piston rod. --
Pump room, a place or room at a mineral spring where the waters are drawn and drunk. [ Eng. ] --
Pump spear. Same as Pump rod, above. --
Pump stock, the stationary part, body, or barrel of a pump. --
Pump well. (Naut.) See Well. [ 1913 Webster ]

v. t. [ imp. & p. p. Pumped p. pr. & vb. n. pumping. ] 1. To raise with a pump, as water or other liquid. [ 1913 Webster ]

2. To draw water, or the like, from; to from water by means of a pump; as, they pumped the well dry; to pump a ship. [ 1913 Webster ]

3. Figuratively, to draw out or obtain, as secrets or money, by persistent questioning or plying; to question or ply persistently in order to elicit something, as information, money, etc. [ 1913 Webster ]

But pump not me for politics. Otway. [ 1913 Webster ]

n. That which is raised by pumps, or the work done by pumps. [ 1913 Webster ]

The pumpage last year amounted to . . . gallons. Sci. Amer. [ 1913 Webster ]

n. One who pumps; the instrument or machine used in pumping. Boyle. [ 1913 Webster ]

n. [ G. ] A sort of bread, made of unbolted rye, which forms the chief food of the Westphalian peasants. It is acid but nourishing. [ 1913 Webster ]

n. A pompet. [ 1913 Webster ]

Pumpet ball (Print.), a ball for inking types; a pompet. [ 1913 Webster ]

a. & n. from pump. [ 1913 Webster ]

Pumping engine, a steam engine and pump combined for raising water. See Steam engine. [ 1913 Webster ]

n. (Bot.) See Pumpkin. [ 1913 Webster ]

n. [ For older pompion, pompon, OF. pompon, L. pepo, peponis, Gr. &unr_;, properly, cooked by the sun, ripe, mellow; -- so called because not eaten till ripe. Cf. Cook, n. ] (Bot.) A well-known trailing plant (Cucurbita pepo) and its fruit, -- used for cooking and for feeding stock; a pompion. [ 1913 Webster ]

Pumpkin seed. (a) The flattish oval seed of the pumpkin. (b) (Zool.) The common pondfish. [ 1913 Webster ]

(Physics) A form of air pump in which exhaustion is produced by a stream of mercury running down a narrow tube, in the manner of an aspirator; -- named from the inventor. [ 1913 Webster ]