a play in which the defensive team is awarded two points as by tackling the offensive ball carrier behind the offensive team's goal line
a defensive back who is primarily responsible for covering pass receivers in the middle of the defensive backfield
adjective
giving safety; reducing danger or harm
See safety in American Heritage Dictionary 4
(sāfˈtē)
nounpl.safe·ties
The condition of being safe; freedom from danger, risk, or injury.
A device designed to prevent accidents, as a lock on a firearm preventing accidental firing.
Football
a. A play in which a member of the offensive team downs the ball, willingly or unwillingly, behind his own goal line, resulting in two points for the defensive team.