Pump

Pump (pŭmp), n. [Probably so called as being worn for pomp or ornament. See Pomp.] A low shoe with a thin sole. Swift.

Pump, 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.

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

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.

Pump, v. t. [imp. & p. p. Pumped (pŭmt; 215); p. pr. & vb. n. pumping.] 1. To raise with a pump, as water or other liquid.

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.

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.

But pump not me for politics. Otway.

Pump, v. i. To work, or raise water, a pump.