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.
To raise with a pump, as water or other liquid.
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.
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.