The term 'blacks out' can be defined in three ways: SWOONS (6 letters), faints (6 letters), and BANS (4 letters). Swooning is a sudden, brief loss of consciousness, usually caused by extreme emotion or physical exhaustion. Fainting is similar to swooning, but it is usually caused by a lack of oxygen to the brain. Baning is the act of prohibiting something, such as a certain type of behavior or activity. All three definitions of 'blacks out' refer to a sudden, temporary loss of consciousness or control.