/ Dictionary / Index I Iseult: Meaning and Definition of Find definitions for: I•seult Pronunciation: (i-slt'), [key] — n. German, the daughter of a king of Ireland who became the wife of King Mark of Cornwall: she was the beloved of Tristram. daughter of the king of Brittany, and wife of Tristram. a female given name. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: iseult (Thesaurus) Isère Isfahan Related Content Daily Word Quiz: sequester Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language