Definition of "security" in English

noun

1. (uncountable) The condition of not being threatened, especially physically, psychologically, emotionally, or financially.

   • Chad always carries a gun for his own security.
   • The pink blanket gives little Mary lots of security.

2. (countable) Something that secures.

3. An organization or department responsible for providing security by enforcing laws, rules, and regulations as well as maintaining order.

   • Pamela works in security.

4. (law) Something that secures the fulfillment of an obligation or law.

5. (law) Freedom from apprehension.

6. (finance, often in the plural) A tradeable financial asset, such as a share of stock or any of various classes of bond.ᵂ

7. (finance) Proof of ownership of stocks, bonds or other investment instruments.

8. (finance) Property etc. temporarily relinquished to guarantee repayment of a loan.

9. A guarantee.

10. (obsolete) Carelessness; negligence.