Dictionary![]() ![]() up•startPronunciation: ( —n., adj.up'stärt"; —v.up-stärt'), [key] —n. 1. a person who has risen suddenly from a humble position to wealth, power, or a position of consequence. 2. a presumptuous and objectionable person who has so risen; parvenu. —adj. being, resembling, or characteristic of an upstart. —v.i. 1. to spring into existence or into view. 2. to start up; spring up, as to one's feet. —v.t. to cause to start up. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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