Official and Authoritative Definitions of Overunity are Non-Existent and their Redirects are Misleading.

Online dictionaries and Wikipedia don't even have an entry for the word: overunity. They merely redirect to their definition of perpetual motion which is not at all relevant. It implies that the term does not exist except in terms of perpetual motion which it defines in terms of no input of energy from an external source. This is not the definition of overunity.

Overunity is synonymous with a coefficience of performance greater than one indicating that more energy exited the system than was used to operate it. This does not mean making something from nothing.

Heat pumps are conventional examples using only a fraction of electricity to power them while transporting a much larger thermal energy gathered from the sun.

This is not to be confused with efficiency since a heat pump may be less than 100% efficient (and usually is), yet still manages to deliver more solar energy than the electricity used to transport that energy to the user. This is overunity and the benefit of not abusing each other with the misuse of our language.