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Longman Dictionary of Contemporary English
plunger
noun
EXAMPLES FROM CORPUS
▪ His left index finger pressed firmly on the telephone plunger as if he were extinguishing a burning cigarette.
▪ How can a sink plunger be so horrific?
The Collaborative International Dictionary
Plunger

Plunger \Plun"ger\, n.

  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

Douglas Harper's Etymology Dictionary
plunger

1610s, "one who plunges," agent noun from plunge (v.). As a mechanism, 1777.

Wiktionary
plunger

n. 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 (context pinball English) The spring-loaded assembly that propels the ball onto the table. 9 (context dated slang English) A reckless gambler. 10 (context pottery English) A boiler in which clay is beaten by a wheel to a creamy consistency. 11 (context firearms English) The firing pin of a breechloader.

WordNet
plunger
  1. n. someone who risks losses for the possibility of considerable gains [syn: speculator]

  2. someone who dives (into water) [syn: diver]

  3. hand tool consisting of a stick with a rubber suction cup at one end; used to clean clogged drains [syn: plumber's helper]

  4. mechanical device that has a plunging or thrusting motion [syn: piston]

Wikipedia
Plunger

A plunger, force cup, plumber's friend, or plumber's helper is a tool used to clear blockages in drains and pipes. It consists of a rubber suction cup with an attached stick (shaft), usually made of wood or plastic. A different bellows-like design also exists, usually constructed of plastic.

Plunger (disambiguation)

A plunger is a device that is used to release stoppages in plumbing

Plunger may also refer to:

  • French press, a simple coffee brewing device
  • Plunger mute, the rubber part of a plumbing plunger used, or a similar device, as a musical mute
  • A component of a syringe
  • USS Plunger, one of several United States naval vessels
  • Plunger-class submarine, an early class of United States Navy submarines
  • Plunger (experimental submarine), evaluated by the United States Navy from 1898 to 1900
  • Plunger lift, one of several methods of natural gas well deliquification techniques available
  • Plunger (pinball), a spring-loaded rod used to launch balls in pinball
Plunger (experimental submarine)

Plunger (also called Holland V) was an experimental submarine which was evaluated by the United States Navy from 1898 to 1900. It is not to be confused with USS Plunger which was commissioned by and served in the U.S. Navy.

Usage examples of "plunger".

We finally withdrew to a safe spot and listened to Tiny and Porta arguing about which of them should be allowed the privilege of pressing the plunger.

Four plunger switches closed, that tiny pilot ray became an enormous rod of force, and as those two gigantic beams met in exact opposition and neutralized each other a solid wall of blinding brilliance appeared in the empty ether behind the Vorkulian fortress.

We had had a washing plunger exactly like this one in our house on Brickyard Row.

The plunger, Schofield guessed, was the part of the machine that drilled down into the ice and obtained the ice cores.

Finally, using a dental fretsaw, he made two lengthwise cuts in the stem of the plunger to receive his slender plastic vanes.

Ryan could only watch as Damm and Nara took turns stabbing each other in the lungs with similar, long-needled hypodermics, teeth clenched, eyes pressed shut as thumbs pressed the plungers home.

The door handle itself was of nonmagnetic brass, concealed in which was a steel plunger, well oiled.

Plunger Plumstead, whose head was sunk, like that of an aged tortoise, into a collar several sizes too large for him, sported an ancient black velvet jacket and a silk scarf.

Richard stood proudly beside Monty, the Labrador, and old Plunger Plumstead was there with an ancient, watery-eyed and evil-looking bull-terrier to whom he might have been closely related.

With a moan, she pushed through the roiling crowds, looking for the entrance to a plunger, the large, ancient elevators that worked the levels in Dahl and most of the other Sectors of Trantor.

Then, as the face grew gray with pain, the anesthesiologist pushed a plunger attached to an IV line, mercifully putting the clone under again.

Returning to the other side of the table, I pushed the plunger down on the coffeemaker and filled two big mugs with steaming coffee.

When that plunger was pushed, the little chatterers would go Off, at the same moment that the barrel went On.

Svetz poured corundum into the chamber, added a dash of chromic oxide, and used the plunger.

Leaning closer, she steadied the lash darkener and lengthener, closed it firmly over the lashes of her left eye, and hit the plunger.