/ Dictionary / Index T thinnish: Meaning and Definition of Find definitions for: thin•nish Pronunciation: (thin'ish), [key] — adj. somewhat thin. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. thinner thin register Related Content Daily Word Quiz: feline Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language