noun

1. 1. the extinguishing of all stage lights to end a play or scene
   2. a comic stage skit ending with a quick blackout
2. an elimination or concealing of all lights that might be visible to an enemy, as during an air raid, at night
3. a temporary loss of electricity in an area because of a failure in its generation or transmission
4. a temporary loss of consciousness or vision
5. a loss of memory of an event or fact
6. suppression or concealment, as of news by censorship
7. ☆ the prohibition of the televising of a sports event in the locality where the event takes place, so that attendance will not be reduced