/ Dictionary / Index Y yeasty: Meaning and Definition of Find definitions for: yeast•y Pronunciation: (yē'stē), [key] — yeast•i•er, yeast•i•est. of, containing, or resembling yeast. frothy; foamy. youthful; exuberant; ebullient. trifling; frivolous. characterized by agitation, excitement, change, etc.: the yeasty years immediately following college. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: yeasty (Thesaurus) yeast nucleic acid Yeats Related Content Daily Word Quiz: impetuous Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language