| noun | the state of being certain that adverse effects will not be caused by some agent under defined conditions “insure the safety of the children” |
| noun | a safe place “He ran to safety” |
| noun | a device designed to prevent injury or accidents |
| noun | (baseball) the successful act of striking a baseball in such a way that the batter reaches base safely |
| noun | contraceptive device consisting of a sheath of thin rubber or latex that is worn over the penis during intercourse |
| noun | a score in American football; a player is tackled behind his own goal line |
| prophylactic | adjective | capable of preventing conception or impregnation |