/ Dictionary / Index C cline: Meaning and Definition of Find definitions for: cline Pronunciation: (klīn), [key] — n. the gradual change in certain characteristics exhibited by members of a series of adjacent populations of organisms of the same species. (in systemic linguistics) a scale of continuous gradation; continuum. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: cline (Thesaurus) clindamycin cling Related Content Daily Word Quiz: lunar Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language