/ Dictionary / Index U upspin: Meaning and Definition of Find definitions for: up•spin Pronunciation: (up'spin"), [key] — n. a sudden, upward, spiraling movement, trend, etc.: another upspin in construction costs. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. upsilon upspring Related Content Daily Word Quiz: eureka Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language