Noun plunger has 4 senses
  1. speculator, plunger - someone who risks losses for the possibility of considerable gains
    --1 is a kind of adventurer, venturer; gambler
    --1 has particulars: hedger; operator; scalper; venture capitalist
  2. diver, plunger - someone who dives (into water)
    --2 is a kind of swimmer
    Derived forms: verb plunge6, verb plunge1
  3. plunger, plumber's helper - hand tool consisting of a stick with a rubber suction cup at one end; used to clean clogged drains
    --3 is a kind of hand tool
    Derived forms: verb plunge1, verb plunge7
  4. piston, plunger - mechanical device that has a plunging or thrusting motion
    --4 is a kind of mechanical device
    --4 is a part of reciprocating engine
    --4 has parts: piston ring; piston rod
    Derived form: verb plunge1
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