safety

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun The condition of being safe; freedom from danger, risk, or injury.
• noun A device designed to prevent accidents, as a lock on a firearm preventing accidental firing.
• noun A play in which a member of the offensive team downs the ball or is tackled or forced out of bounds behind his own goal line, resulting in two points for the defensive team.
• noun Either of two defensive backs normally positioned behind the linebackers in the middle of the backfield.

from The Century Dictionary.

• noun Defensive strategy at billiards. In America, since 1879, deliberate resort to misses has been restricted by limiting such misses to three in succession, and contingently to two.
• noun In base-ball, a safe hit.
• noun Immunity from harm or danger; preservation or freedom from injury, loss, or hurt.
• noun An unharmed or uninjured state or condition: as, to escape in safety.
• noun Freedom from risk or possible damage or hurt; safeness.
• noun A safeguard.
• noun Safe-keeping; close custody.
• noun A safety-bicycle.
• noun In foot-ball, a safety touch-down.

from the GNU version of the Collaborative International Dictionary of English.

• noun The condition or state of being safe; freedom from danger or hazard; exemption from hurt, injury, or loss.
• noun Freedom from whatever exposes one to danger or from liability to cause danger or harm; safeness; hence, the quality of making safe or secure, or of giving confidence, justifying trust, insuring against harm or loss, etc.
• noun Preservation from escape; close custody.
• noun (Amer. Football) the act or result of a ball-carrier on the offensive team being tackled behind his own goal line, or the downing of a ball behind the offensive team's own goal line when it had been carried or propelled behind that goal line by a player on the offensive tream; such a play causes a score of two points to be awarded to the defensive team; -- it is distinguished from touchback, when the ball is downed behind the goal after being propelled there or last touched by a player of the defending team. See Touchdown. Same as Safety touchdown, below.
• noun archaic Short for Safety bicycle.
• noun archaic a switch on a firearm that locks the trigger and prevents the firearm from being discharged unintentionally; -- also called safety catch, safety lock, or lock.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun The condition or feeling of being safe; security; certainty.
• noun mechanics A mechanism on a weapon or dangerous equipment designed to prevent accidental firing.
• noun American football An instance of a player being sacked or tackled in the end zone, or steps out of the end zone and off the field, resulting in two points for the opposite team.
• noun American football Any of the defensive players who are in position furthest from the line of scrimmage and whose responsibility is to defend against passes as well as to be the tacklers of last resort.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun a score in American football; a player is tackled behind his own goal line
• 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 the state of being certain that adverse effects will not be caused by some agent under defined conditions
• noun a safe place