security Definition in the Cambridge English Dictionary Cambridge dictionaries logo
Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

Definition of “security” - English Dictionary

"security" in American English

See all translations

securitynoun

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)







"security" in British English

See all translations

securitynoun

uk   /sɪˈkjʊə.rə.ti/ us   /səˈkjʊr.ə.t̬i/
  • security noun (PROTECTION)

B1 [U] protection of a person, building, organization, or country against threats such as crime or attacks by foreign countries: The station was closed for two hours because of a security alert. 30 demonstrators were killed in clashes with the security forces over the weekend. The tighter security measures/precautions include video cameras throughout the city centre. The students were deported because they posed a threat to national security. The banks must tighten security against fraud. The most dangerous criminals are held in maximum-security prisons (= prisons that are as difficult as possible to escape from).
[U, + sing/pl verb] the group of people responsible for protecting a building: You'll need to notify security if you want to work late in the office.

expend iconexpend iconMore examples

  • security noun (FINANCE)

[U] property or goods that you promise to give to someone if you cannot pay what you owe them: She used her shares in the company as security against a $23 million bank loan. The hotel held onto our suitcases as security while we went to the bank to get money to pay the bill.
securities [plural] specialized
investment in a company or in government debt that can be traded on the financial markets and produces an income for the investor
  • security noun (CONFIDENCE)

C2 [U] the feeling of being confident in one's family and relationships: Most children need the security of a stable family life.
(Definition of security from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)

"security" in Business English

See all translations

securitynoun

uk   /sɪˈkjʊərəti/ us  
[U] the protection of people, organizations, countries, etc. against a possible attack or other crime: border/homeland/national securityboost/improve/tighten security Airport security has been tightened since the terrorist threat. lax/strict/tight security He was head of security at the Federal Aviation Administration. security firm/contractor/companysecurity system/check/measure Anyone entering the building has to undergo a series of security checks. The airport was temporarily closed due to a security alert. security cameras/lights/doors
[U] IT, BANKING, INTERNET the protection of information against being stolen or used wrongly or illegally: data/information/IT securitysecurity measures/checks/controls The bank has taken additional security measures to ensure accounts are protected.
[U] the fact or feeling that your job, money, etc. is safe and you will not lose it: He left the relative security of a corporate job to set up on his own.give/offer sb security His 15-year career in investment banking has given him the financial security to transfer his skills to the voluntary sector. economic/financial security They are concerned about the security of their investments.
[C, usually plural] plural securities FINANCE, STOCK MARKET a financial investment such as a bond or share that is traded on a financial market: buy/hold/sell securities Investors who bought securities made up of subprime loans suffered the biggest losses. deal in/invest in/issue securities a securities agreement/audit/dealer a securities business/company/house
[U] FINANCE property or goods that you promise to give someone if you cannot pay them what you owe them: give/offer/pledge sth as security She signed papers pledging their home as security against the loan.
(Definition of security from the Cambridge Business English Dictionary © Cambridge University Press)
What is the pronunciation of security?
Add Cambridge dictionaries to your browser to your website

“security” in Business English

Avoiding common errors with the word enough.
Avoiding common errors with the word enough.
by ,
May 25, 2016
by Liz Walter Enough is a very common word, but it is easy to make mistakes with it. You need to be careful about its position in a sentence, and the prepositions or verb patterns that come after it. I’ll start with the position of enough in the sentence. When we use it with a noun,

Read More 

Word of the Day

environment

the air, water, and land in or on which people, animals, and plants live

Word of the Day

decision fatigue noun
decision fatigue noun
May 30, 2016
a decreased ability to make decisions as a result of having too many decisions to make Our brains have a finite number of decisions they can make before they get depleted and become less discerning – so this is called decision fatigue.

Read More