/ Dictionary / Index C cotter: Meaning and Definition of Find definitions for: cot•ter Pronunciation: (kot'ur), [key] — Mach. Mach. —n. a pin, wedge, key, or the like, fitted or driven into an opening to secure something or hold parts together. See —v.t. to secure with a cotter. cot•ter Pronunciation: (kot'ur), [key] — n. a person occupying a plot of land and cottage, paid for in services. cottager (def. 2). Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: cotter (Thesaurus) Cottbus cotter pin Related Content Daily Word Quiz: pedagogy Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language