/ Dictionary / Index D deep-seated: Meaning and Definition of Find definitions for: deep-seat•ed Pronunciation: (dēp'sē'tid), [key] — adj. firmly implanted or established: a deep-seated sense of loyalty. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: deep-seated (Thesaurus) deep-sea core deep-set Related Content Daily Word Quiz: supine Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language