Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

  

English definition of “security”

security

noun [U]     /sɪˈkjʊərəti/
BEING SAFE B1 the things that are done to keep someone or something safe: airport/national security a security alarmSafe and secureProtection and protectorsEnvironmental issues
SAFE SITUATION a situation in which something is not likely to fail or be lost: financial security job security Safe and secure
CONFIDENCE confidence about yourself and the situation that you are in: the security of a long-term relationship → Opposite insecurity (insecure)Confidence and self-assuranceShowing arrogance and conceit
BORROWING something valuable that you offer to give someone when you borrow money if you cannot pay the money back → See also social securityBorrowing, lending and debt
INFORMATION the protection of information against being stolen or used wrongly or illegally: IT securityProtection and protectorsEnvironmental issues
(Definition of security noun from the Cambridge Learner's Dictionary © Cambridge University Press)

Definitions of “security” in other dictionaries

Word of the Day

work out

to exercise in order to improve the strength or appearance of your body

Word of the Day

Blog

Read our blog about how the English language behaves.

Learn More

New Words

Find words and meanings that have just started to be used in English, and let us know what you think of them.

Learn More