/ Dictionary / Index T tarn: Meaning and Definition of Find definitions for: tarn Pronunciation: (tärn), [key] a small mountain lake or pool, esp. one in a cirque. Tarn Pronunciation: (tarn), [key] a department in S France. 338,024; 2232 sq. mi. (5780 sq. km). Cap.: Albi. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: tarn (Thesaurus) tarmacadam tarnation 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