Meaning

2 senses
  1. (US)A split pin, the ends of which project through an object being fastened and are bent back to hold it in place.

    a cotter consisting of a split pin that is secured (after passing through a hole) by splitting the ends apart

  2. (UK)A pin or wedge inserted through a slot to hold machine parts together; a cotter.

Forms

plural: cotter pins
Singularcotter pin
Pluralcotter pins

regular

See also

neighbours in the dictionary
cotter pin — meaning, examples, forms, synonyms | Krumeto