Unity 8: power

[Hannie Dumoleyn]

While translating [1] I came upon the word "Power", string # 14. The 
context is: Title: Power off/Restart dialog.

Does anyone know what "Power" means here? I guess it has nothing to do 
with the power supply, but more likely with "Power On / Off".

Hannie

[1] 
https://translations.launchpad.net/unity8/trunk/+pots/unity8/nl/+translate?field.alternative_language-empty-marker=1&memo=10&show=all&start=10