Plunger

Origin

From plunge + -er.

Full definition of plunger

Noun

1. A device that is used to remove blockages from a toilet or sink by suction.
2. The internal piece of a syringe that pushes out or pulls in any contents.
3. The sliding activator of an exploder, an electrical generator used to trigger electrical detonators such as blasting caps.
4. The part of a cafetière that is pushed down to remove grounds from coffee.
5. One who plunges; a diver.
6. A device similar to a piston but without a mechanism; a long solid cylinder used, instead of a piston or bucket, as a forcer in pumps.
7. The moving portion of solenoid.
8. (pinball) The spring-loaded assembly that propels the ball onto the table.
9. (dated, slang) A reckless gambler.
10. (pottery) A boiler in which clay is beaten by a wheel to a creamy consistency.
11. (firearms) The firing pin of a breechloader.

Synonyms

• (device) plumber's helper colloquial, plumber's friend colloquial

Derived terms

• autoplunger