plunge /plunj/

1. To put or thrust suddenly under the surface of a liquid, or into the midst of, the thick of, or the substance of anything
2. To immerse

1. To fling oneself or rush impetuously, esp into water, downhill, or into danger or discourse
2. To turn suddenly and steeply downward
3. To fire down on an enemy from a height
4. To gamble or squander recklessly
5. (of a ship) to pitch
6. To pitch suddenly forward and throw up the hindlegs

An act of plunging

plungˈer noun

1. A person who plunges
2. Part of a mechanism with a plunging movement, such as the solid piston of a force pump
3. A suction instrument for clearing blockages in pipes
4. A cavalryman (obsolete milit sl)
5. A reckless gambler or squanderer

plungˈing adjective and noun

plunge bath noun

A bath large enough to immerse the whole body

plunge-cut milling noun (engineering)

Milling without transverse movement of the workpiece relative to the cutter

plunge pool noun

A small swimming pool deep enough to immerse the body, esp used for its invigorating coolness after a sauna

plunging fold noun (geology)

A fold whose axis is not horizontal

plunging neckline noun

A low-cut neckline in a woman's dress, blouse, etc

take the plunge

To commit oneself definitely after hesitation

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