[n] a wooden peg or pin inserted into the eye at the end of rope in order to fasten it to something
[n] a hinged switch that can assume either of two positions
[n] any instruction that works first one way and then the other; it turns something on the first time it is used and then turns it off the next time
[v] release by a toggle switch, of a bomb from an airplane
[v] fasten with, or as if with, a toggle
[v] provide with a toggle or toggles