/ Dictionary / Index T thrasonical: Meaning and Definition of Find definitions for: thra•son•i•cal Pronunciation: (thrā-son'i-kul), [key] — adj. boastful; vainglorious. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. thrashing Thrasybulus Related Content Daily Word Quiz: panacea Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language