A stationery fastener that is inserted into punched holes in a stack of paper before being bent to secure them.
A metal fastener with two tines, the ends of which project through an object being fastened and are bent back to hold it in place.
A small nail-like tack with a slightly rounded head that can be pressed into place with light pressure from the thumb; used for hanging light articles on a wall or noticeboard.
To fix or attach something with a thumbtack.