/ Dictionary / Index R reentrant: Meaning and Definition of Find definitions for: re•en•trant Pronunciation: (rē-en'trunt), [key] — adj. reentering or pointing inward: a reentrant angle. —n. a reentering angle or part. a person or thing that reenters or returns: Reentrants to the engineering program must take the introductory course again. a prominent indentation in a coastline. Cf.(def. 6). Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: reentrant (Thesaurus) reentering polygon reentry Related Content Daily Word Quiz: vertigo Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language