Etymology
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toggle (n.)

1769, "pin passed through the eye of a rope, strap, or bolt to hold it in place," a nautical word of uncertain origin, perhaps a frequentative form of tog "tug." As a kind of wall fastener it is recorded from 1934. Toggle bolt is from 1794; toggle switch, the up-and-down sort, first attested 1938. In computing by 1979, in reference to a key which alternates the function between on and off when struck.

toggle (v.)

1836, "make secure with a toggle," from toggle (n.). Meaning "alternate back and forth between opposite actions" is by 1982. Related: Toggled; toggling.

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Definitions of toggle
1
toggle (v.)
provide with a toggle or toggles;
toggle (v.)
fasten with, or as if with, a toggle;
toggle (v.)
release by a toggle switch;
toggle a bomb from an airplane
2
toggle (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;
toggle (n.)
a hinged switch that can assume either of two positions;
Synonyms: toggle switch / on-off switch / on/off switch
toggle (n.)
a fastener consisting of a peg or pin or crosspiece that is inserted into an eye at the end of a rope or a chain or a cable in order to fasten it to something (as another rope or chain or cable);
From wordnet.princeton.edu