security in WordNet English dictionary

1. a formal declaration that documents a fact of relevance to finance and investment; the holder has a right to receive interest or dividends
   "he held several valuable securities"
   security  certificate 
   
2. defense against financial failure; financial independence
   "his pension gave him security in his old age"; "insurance provided protection against loss of wages due to illness"
   security  protection 
   
3. measures taken as a precaution against theft or espionage or sabotage etc.
   "military security has been stepped up since the recent uprising"
   security  security measures 
   
4. an electrical device that sets off an alarm when someone tries to break in
   security system  security measure  security 
   
5. a guarantee that an obligation will be met
   security  surety 
   
6. freedom from anxiety or fear
   "the watch dog gave her a feeling of security"
   security 
   
7. a department responsible for the security of the institution's property and workers
   "the head of security was a former policeman"
   security  security department 
   
8. property that your creditor can claim in case you default on your obligation
   "bankers are reluctant to lend without good security"
   security  surety 
   
9. the state of being free from danger or injury
   "we support the armed services in the name of national security"
   security