A Quick and Simple Dictionary

plunge

1. Noun.  the act of plunging or submerging.
2. Noun.  a dive, leap, rush, or pitch into (into water).
3. Noun.  (figuratively) the act of pitching or throwing one's self headlong or violently forward, like an unruly horse.
4. Noun.  (slang) heavy and reckless betting in horse racing; hazardous speculation.
5. Noun.  (obsolete) an immersion in difficulty, embarrassment, or distress; the condition of being surrounded or overwhelmed; a strait; difficulty.
6. Verb.  (transitive) to thrust into water, or into any substance that is penetrable; to immerse;.
7. Verb.  (figuratively, transitive) to cast or throw into some thing, state, condition or action.
8. Verb.  (transitive, obsolete) to baptize by immersion.
9. Verb.  (intransitive) to dive, leap or rush (into water or some liquid); to submerge one's self.
10. Verb.  (figuratively, intransitive) to fall or rush headlong into some thing, action, state or condition.
11. Verb.  (intransitive) to pitch or throw one's self headlong or violently forward, as a horse does.
12. Verb.  (intransitive, slang) to bet heavily and with seeming recklessness on a race, or other contest; in an extended sense, to risk large sums in hazardous speculations.
13. Verb.  (intransitive, obsolete) to entangle or embarrass (mostly used in past participle).
14. Verb.  (intransitive, obsolete) to overwhelm, overpower.