/ Dictionary / Index T thru: Meaning and Definition of Find definitions for: thru Pronunciation: (thr), [key] — prep., adv., adj. an informal, simplified spelling of Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. throw weight thrum Related Content Daily Word Quiz: perspicacious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language