Rogets II: The New Thesaurus, Third Edition. 1995.
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NOUN:
1.Informal. A sudden involuntary drop to the ground: dive, fall, nosedive, pitch, plunge, spill, tumble. SeeRISE. 2.Informal. The act of plunging suddenly downward into or as if into water: dive, nosedive, plunge, swoop. SeeENTER.