/ Dictionary / Index T top yeast: Meaning and Definition of Find definitions for: top' yeast" Pronunciation: [key] yeast that rises to the surface as froth during fermentation. Also called surface yeast. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. top timber toque Related Content Daily Word Quiz: frugal Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language