1. Freedom from risk or danger; safety. 2. Freedom from doubt, anxiety, or fear; confidence. 3. Something that gives or assures safety, as: 4. Call building security if a visitor acts suspicious. 5. Measures adopted by a government to prevent espionage, sabotage, or attack. 6. Security was lax at the firm's smaller plant. 7. Security in the prison is very tight. 8. The level to which a program or device is safe from unauthorized use. 9. Prevention of unauthorized use of a program or device. 10. Something deposited or given as assurance of the fulfillment of an obligation; a pledge. 11. One who undertakes to fulfill the obligation of another; a surety. 12. A document indicating ownership or creditorship; a stock certificate or bond.
