Security has to be compared to related concepts: safety continuity reliability.. security as a national condition was defined in a united nations. Offers tools documentation tips and other information regarding personal privacy and security for home users developers and businesses. A group or department of private guards: call building security if a visitor acts suspicious.. measures adopted to prevent escape: security in the prison is very tight.. Translations of security. security synonyms security antonyms. information about security in the free online english dictionary and encyclopedia.. Security definition at dictionary.com a free online dictionary with pronunciation synonyms and translation. look it up now! Security certification ? comptia security+ certification validates knowledge of communication security infrastructure security cryptography operational. Security an instrument representing ownership (stocks) a debt agreement (bonds) or the rights to ownership (derivatives) Official site for the social security adminstration featuring online forms benefits information and other services. Guide to computer and online security covering privacy issues passwords viruses and spyware.