security Definition in the Cambridge English Dictionary
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Definition of “security” - English Dictionary

Definition of "security" - American English Dictionary

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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 ​WhiteHouse and the ​president, they ​felt it ​necessary to ​close the ​avenue. A ​convictedspy, he ​soldinformation that may have ​damagedournational security. [U] social studies Security is also the ​group of ​peopleresponsible for ​keepingbuildings or other ​areassafe: If anyone gives you ​trouble, just ​call security.

security noun (INVESTMENT)

[C usually pl] an ​investment in a ​company or in ​governmentdebt that can be ​traded on the ​financialmarkets

security noun (MONEY)

[U] money you ​pay someone that can be ​legally used by that ​person if ​youractionscause the ​person to ​losemoney, 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)

Definition of "security" - British English Dictionary

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securitynoun

uk   /sɪˈkjʊə.rɪ.ti/  us   /-ˈkjʊr.ə.t̬i/

security noun (PROTECTION)

B1 [U] protection of a ​person, ​building, ​organization, or ​country against ​threats such as ​crime or ​attacks by ​foreigncountries: 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/​precautionsincludevideocamerasthroughout the ​citycentre. The ​students were ​deported because they ​posed a ​threat to national security. The ​banks must tighten security against ​fraud. The most ​dangerouscriminals are ​held in maximum-security ​prisons (= ​prisons that are as ​difficult as ​possible to ​escape from). [U, + sing/pl verb] the ​group of ​peopleresponsible for ​protecting a ​building: You'll need to ​notify security if you ​want to ​work late in the ​office.
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security noun (CERTAINTY)

C1 [U] the ​fact that something is not ​likely to ​fail or be ​lost: If it's a ​choice between ​higherpay and job security, I'd ​prefer to ​keep my ​job. I'm on a ​temporarycontract and have little ​financial security (= cannot be ​sure of having enough ​money to ​live on).

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 ​bankloan. The ​hotelheld onto ​oursuitcases as security while we went to the ​bank to get ​money to ​pay the ​bill.securities [plural] specialized investment in a ​company or in ​governmentdebt that can be ​traded on the ​financialmarkets 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 ​stablefamilylife.
(Definition of security from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)

Definition of "security" - Business English Dictionary

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securitynoun

uk   us   /sɪˈkjʊərəti/
[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 ​closeddue 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 ​corporatejob to set up on his own.give/offer sb security His 15-year ​career in ​investmentbanking has given him the ​financial security to ​transfer his ​skills to the ​voluntarysector. economic/​financial security They are ​concerned about the security of their ​investments.
[C, usually plural] (plural securities) FINANCE, STOCK MARKET a ​financialinvestment such as a ​bond or ​share that is ​traded on a ​financialmarket: buy/hold/sell securities Investors who ​bought securities made up of ​subprimeloans 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 ​signedpaperspledging their ​home as security against the ​loan.
(Definition of security from the Cambridge Business English Dictionary © Cambridge University Press)
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“security” in Business English

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