/ Dictionary / Index T Tyrrhenian Sea: Meaning and Definition of Find definitions for: Tyr•rhe'ni•an Sea' Pronunciation: (ti-rē'nē-un), [key] a part of the Mediterranean, bounded by W Italy, Corsica, Sardinia, and Sicily. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Tyrr Tyrrheus Related Content Daily Word Quiz: philtrum Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language