/ Dictionary / Index T thoro: Meaning and Definition of Find definitions for: thor•o Pronunciation: (thûr'ō, thur'ō), [key] — adj., adv. an informal, simplified spelling of Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. thorny Thorold Related Content Daily Word Quiz: dissonant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language