blacken out (verb)

1. In Greek mythology, Zeus blacked out the sky with thunderclouds during the battle with the Titans.

2. The designer chose to use blackened-out timber to give the exterior of the building a modern and sleek look.

3. In the science fiction novel, the protagonist discovered a mysterious device that could blacken out the entire city with just a push of a button.

4. As the haunted house came to life, all the lights blacked out, plunging the terrified visitors into complete darkness.