security

• n.
  • the state of being free from danger or injury

    "we support the armed services in the name of national security"

  • a formal declaration that documents a fact of relevance to finance and investment; the holder has a right to receive interest or dividends

    同义词： certificate

  • a department responsible for the security of the institution's property and workers

    "the head of security was a former policeman"

    同义词： security department

  • measures taken as a precaution against theft or espionage or sabotage etc.

    "military security has been stepped up since the recent uprising"

    同义词： security measures

  • defense against financial failure; financial independence

    "his pension gave him security in his old age"

    同义词： protection

  • freedom from anxiety or fear

    "the watch dog gave her a feeling of security"

  • an electrical device that sets off an alarm when someone tries to break in

    同义词： security system security measure

  • property that your creditor can claim in case you default on your obligation

    "bankers are reluctant to lend without good security"

    同义词： surety

  • a guarantee that an obligation will be met

    同义词： surety

以上来源于: WordNet