How do you spell Cotter

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