/ Dictionary / Index T thalassocrat: Meaning and Definition of Find definitions for: tha•las•so•crat Pronunciation: (thu-las'u-krat"), [key] — n. a nation that has dominion over the seas. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. thalassocracy thalassography Related Content Daily Word Quiz: clairvoyant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language