\Force" pump`\ (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}.