(1):
(n.) A toggle.
(2):
(v. t.) To fasten with a cotter.
(3):
(n.) Alt. of Cottar
(4):
(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.