Meaning of SAFETY in English

■ noun ( plural safeties )

1》 the condition of being safe.

↘[as modifier ] denoting something designed to prevent injury or damage: a ~ barrier.

2》 US informal a condom.

3》 American Football a defensive back who plays in a deep position.

4》 American Football a play in which the ball is downed by the offence in their own end zone, scoring two points to the defence.

Concise Oxford English vocab.      Сжатый оксфордский словарь английского языка.