Look up plunger in Wiktionary, the free dictionary.
A plunger is a device that is used to release stoppages in plumbing.
Plunger may also refer to:
- Plunger or blasting machine, used to detonate explosives
- A component of a syringe
- Plunger (pinball), a spring-loaded rod used to launch balls in pinball
- The Plunger, a 1920 American film
- USS Plunger, four United States Navy submarines
- Plunger-class submarine, an early class of United States Navy submarines
- The Plungers, an obsolete nickname for the Household Cavalry