A short nail with a thick head, typically used in boot soles.
To tread down roughly, as with hobnailed shoes.
To fit with hobnails.
A stationery fastening device made of thin, soft metal, with a round head and a flat, split shank, which is spread after insertion in a hole in a stack of pages, in much the same way as a cotter pin or a split rivet.
Any similar stationery fastening device.