- any part, such as a pin, wedge, key, etc, that is used to secure two other parts so that relative motion between them is prevented
- short for cotter pin
WordReference Random House Learner's Dictionary of American English © 2017
- Mechanical Engineeringa pin or wedge inserted into an opening to secure something.
- Mechanical EngineeringAlso, ˈcot•ter ˌpin. a pin having a split end that is spread after being pushed through a hole to prevent it from working loose.
- Mechanical Engineeringa pin, wedge, key, or the like, fitted or driven into an opening to secure something or hold parts together.
- Mechanical EngineeringSee cotter pin.
- Mechanical Engineeringto secure with a cotter.
- 1300–50; Middle English coter; akin to late Middle English coterell iron bracket; of uncertain origin, originally
cot•ter2 (kot′ər),USA pronunciation n.
- Scottish Termsa person occupying a plot of land and cottage, paid for in services.
- cottager (def. 2).
- Anglo-French cot(i)er; see cot2, -er2
- Middle English cotere 1175–1225
Also called: cottier a villein in late Anglo-Saxon and early Norman times occupying a cottage and land in return for labour
- Also called: cottar a peasant occupying a cottage and land in the Scottish Highlands under the same tenure as an Irish cottier