Definify.com
Webster 1913 Edition
Plunger
Plun′ger
,Noun.
1.
One who, or that which, plunges; a diver.
2.
A long solid cylinder, used, instead of a piston or bucket, as a forcer in pumps.
3.
One who bets heavily and recklessly on a race; a reckless speculator.
[Cant]
4.
(Pottery)
A boiler in which clay is beaten by a wheel to a creamy consistence.
Knight.
5.
(Gun.)
The firing pin of a breechloader.
Plunger bucket
, a piston, without a valve, in a pump.
– Plunger pole
, the pump rod of a pumping engine.
– Plunger pump
, a pump, as for water, having a plunger, instead of a piston, to act upon the water. It may be single-acting or double-acting
Webster 1828 Edition
Plunger
PLUNG'ER
,Noun.
1.
A cylinder used as a forcer in pumps.