/ Dictionary / Index T thetic: Meaning and Definition of Find definitions for: thet•ic Pronunciation: (thet'ik, thē'tik), [key] — adj. positive; dogmatic. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Thetford Mines Thetis 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