📒 a period when there is no light as a result of an electrical power failure
📒 a situation when the government or the police will not allow any news or information on a particular subject to be given to the public
📒 a period of time during a war when all lights must be put out or covered at night, so that they cannot be seen by an enemy attacking by air
📒 a piece of material that covers windows to stop light being seen from outside, or light from outside from coming into a room
📒 a temporary loss of consciousness, sight or memory