security

noun

1.
the state of being free from danger or injury
Antonym:
insecurity
Derived from:
secure
2.
defense against financial failure; financial independence
Derived from:
secure
3.
freedom from anxiety or fear
Derived from:
secure
4.
a formal declaration that documents a fact of relevance to finance and investment; the holder has a right to receive interest or dividends
5.
property that your creditor can claim in case you default on your obligation
6.
a department responsible for the security of the institution's property and workers
7.
a guarantee that an obligation will be met
8.
an electrical device that sets off an alarm when someone tries to break in
9.
measures taken as a precaution against theft or espionage or sabotage etc.