power down ‎(third-person singular simple present powers down, present participle powering down, simple past and past participle powered down)

  1. (transitive, intransitive) To switch off (something electrical).
    • 2014 June 29, Adam Sherwin, “UK cinemas ban Google glasses over piracy risk”, in The Independent[1]:
      Google Glass batteries power down after 45 minutes of continuous recording, making it unlikely anyone could capture an entire film.