/ Dictionary / Index C coterminous: Meaning and Definition of Find definitions for: co•ter•mi•nous Pronunciation: (kō-tûr'mu-nus), [key] — adj. having the same border or covering the same area. being the same in extent; coextensive in range or scope. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: coterminous (Thesaurus) coterie Côtes-du-Nord Related Content Daily Word Quiz: pudgy Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language