To lose consciousness; to suffer a blackout.
To censor or cover up.
To obscure in darkness.
To be in a state of black out, as a building, a city, a ship.
To censor or cover up by writing over with black ink.
To cause (a person) to lose consciousness by applying a chokehold.
To say (something) with difficulty, while or as if choking.
To extinguish (fire) (by depriving it of oxygen or fuel).
To destroy (something) by depriving it of a vital resource.
To prevent (light) from passing through.
To prevent (something) from growing by overwhelming it or robbing it of nutrients.