1. A device for enabling a railway car to pass from one track to another.

2. The junction of two tracks.

1. A hardware or programmed device for indicating that one of several alternative states or conditions have been chosen, or to interchange or exchange two data items.

2. A symbol used to indicate a branch point, or a set of instructions to condition a branch.

A manual or mechanically actuated device for making, breaking, or changing the connections in an electric circuit. Also known as electric switch. Symbolized SW.