toggle

To alternate between two positions using a single switch or lever.

Noun

A wooden or metal pin, short rod, crosspiece or similar, fixed transversely in the eye of a rope or chain to be secured to any other loop, ring, or bight, e.g. a sea painter to a lifeboat.
A rod-shaped button bound with slack to the fabric.
A toggle switch.
An appliance for transmitting force at right angles to its direction.
A horizontal piece of wood that is placed on a door, flat, or other wooden structure, but is not on one of the edges of the structure.
A fastener that has flaps that align vertically to penetrate a surface and then spread out to secure the fastener in position, e.g. a molly bolt.
- Hooks come with screws for use in plaster or wood and toggles for use in wallboard. - 1991, Kalton C. Lahue, Cheryl Smith, Interior Lighting, page 19:
A loop of webbing or a dowel affixed to the end of the steering/brake lines of a parachute providing the pilot with a means of control.

Of uncertain origin. Possible alteration of tug (“to pull”) + -le

To alternate between two positions using a single switch or lever.
- Clicking a button will alternately toggle its light on OR off.
To switch between alternate states.
- toggle to lower/upper case
- You can quickly toggle the case of selected text by pressing Alt+C.
- He’s that rare creature who’s equally powerful in the classics and popular fare, who’s dedicated to toggling between stage and screen. He is both prolific and enigmatic, disappearing into a dazzling range of characters....
To fix like a toggle iron; to fix fast.