Meaning of SECURITY in English

SECURITY

/ sɪˈkjʊərəti; NAmE səˈkjʊr-/ noun

( pl. -ies )

PROTECTION

1.

[ U ] the activities involved in protecting a country, building or person against attack, danger, etc. :

national security (= the defence of a country)

airport security

They carried out security checks at the airport.

The visit took place amidst tight security (= the use of many police officers) .

the security forces / services (= the police, army, etc.)

a high / maximum security prison (= for dangerous criminals)

—see also high-security

2.

[ U+sing./pl. v . ] the department of a large company or organization that deals with the protection of its buildings, equipment and staff :

Security was / were called to the incident.

3.

[ U ] protection against sth bad that might happen in the future :

financial security

Job security (= the guarantee that you will keep your job) is a thing of the past.

FEELING HAPPY / SAFE

4.

[ U ] the state of feeling happy and safe from danger or worry :

the security of a loving family life

She'd allowed herself to be lulled into a false sense of security (= a feeling that she was safe when in fact she was in danger) .

FOR A LOAN

5.

[ U , C ] a valuable item, such as a house, that you agree to give to sb if you are unable to pay back the money that you have borrowed from them :

His home and business are being held as security for the loan.

SHARES IN COMPANY

6.

securities [ pl. ] ( finance ) documents proving that sb is the owner of shares, etc. in a particular company

—see also social security

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WORD ORIGIN

late Middle English : from Old French securite or Latin securitas , from securus free from care, from se- without + cura care.

Oxford Advanced Learner's English Dictionary.      Оксфордский английский словарь для изучающик язык на продвинутом уровне.