A needle without an eye (usually) made of drawn-out steel wire with one end sharpened and the other flattened or rounded into a head, used for fastening.

A cylinder often of wood or metal used to fasten or as a bearing between two parts.

A slender object specially designed for use in a specific game or sport, such as skittles or bowling.

Any of the individual connecting elements of a multipole electrical connector.

A simple accessory that can be attached to clothing with a pin or fastener, often round and bearing a design, logo or message, and used for decoration, identification or to show political affiliation, etc.

Either a scenario in which moving a lesser piece to escape from attack would expose a more valuable piece to being taken instead, or one where moving a piece is impossible as it would place the king in check.

To fasten or attach (something) with a pin.

To cause (a piece) to be in a pin.