plunger: Meaning and Definition of

plung•er

Pronunciation: (plun'jur), [key]
— n.
  1. a pistonlike reciprocating part moving within the cylinder of a pump or hydraulic device.
  2. a pistonlike part in the valve of a pneumatic tire.
  3. Also calleda device consisting of a handle with a rubber suction cup at one end, used as a force pump to free clogged drains and toilet traps.
  4. a person or thing that plunges.
  5. a reckless bettor or speculator.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
See also:
plunge pool plunging fire
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