security - definition in the American English Dictionary - Cambridge Dictionaries Online

Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

English definition of “security”

See all translations

security

noun  us   /sɪˈkjʊər·ɪ·t̬i/

security noun (FREEDOM FROM RISK)

[U] freedom from risk and the threat of change for the worse : financial/job security

security noun (FREE FROM DANGER)

[U] social studies freedom from danger; safety: For security reasons, for the protection of the White House and the president, they felt it necessary to close the avenue. A convicted spy, he sold information that may have damaged our national security. [U] social studies Security is also the group of people responsible for keeping buildings or other areas safe: If anyone gives you trouble, just call security.

security noun (INVESTMENT)

security noun (MONEY)

[U] money you pay someone that can be legally used by that person if your actions cause the person to lose money, but that will be returned to you if it is not used: You have give the landlord an extra month’s rent as security when you sign the lease.
(Definition of security from the Cambridge Academic Content Dictionary © Cambridge University Press)
What is the pronunciation of security?
Add Cambridge dictionaries to your browser to your website

More American English definitions for “security”

Definitions of “security” in other dictionaries

Word of the Day

generous

willing to give money, help, kindness, etc., especially more than is usual or expected

Word of the Day

May I sit here? Asking for and giving permission.

by Liz Walter,
June 03, 2015
We often find ourselves in situations where we need to ask for permission or to reply to people who ask us for permission. Here are some words and phrases to help you do this in a natural way. The simplest way to ask for permission is with the modal verb can: Can

Read More 

ebolaphobia noun

June 01, 2015
irrational fear of the (spread of) the Ebola virus Ebolaphobia Going Viral

Read More