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[*]Freedom from risk or danger; safety.
[*]Freedom from doubt, anxiety, or fear; confidence.
[*]Something that gives or assures safety, as:
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[*]A group or department of private guards: Call building security if a visitor acts suspicious.
[*]Measures adopted by a government to prevent espionage, sabotage, or attack.
[*]Measures adopted, as by a business or homeowner, to prevent a crime such as burglary or assault: Security was lax at the firm’s smaller plant.
[*]Measures adopted to prevent escape: Security in the prison is very tight.
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[*]Something deposited or given as assurance of the fulfillment of an obligation; a pledge.
[*]One who undertakes to fulfill the obligation of another; a surety.
[*]A document indicating ownership or creditorship; a stock certificate or bond.
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Etymology: from Latin securus free from care, from se-without + cura care.
The word is related to sure, ensure, insurance, reassure. Also related in meaning to safe (affording security or protection from harm), although this word derives from Latin salvus.
There are plenty of ‘security agencies’ around, but do you feel secure?
