- (n.) A piece of wood or metal, commonly wedge-shaped, used for fastening together parts of a machine or structure. It is driven into an opening through one or all of the parts. [See Illust.] In the United States a cotter is commonly called a key.
- (n.) Alternative of Cottar.
- (n.) A toggle.
- (v.t.) To fasten with a cotter.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). cotter. Retrieved September 20, 2026, from http://smartdefine.org/cotter/definitions/1992103 |
| Chicago | Webster's. 2011. "cotter" http://smartdefine.org/cotter/definitions/1992103 (accessed September 20, 2026). |
| Harvard | Webster's 2011, cotter, Smart Define, viewed 20 September, 2026, <http://smartdefine.org/cotter/definitions/1992103>. |
| MLA | Webster's. "cotter" 27 May 2011. Web. 20 September 2026. <http://smartdefine.org/cotter/definitions/1992103> |