Tra từ security - Từ điển Oxford Advanced Learner 8th

se·cur·ity AW [security securities] BrE [sɪˈkjʊərəti] NAmE [səˈkjʊrəti] noun (pl. se·cur·ities)

PROTECTION
1. uncountable 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)
•a security alert
•The criminals were caught (= filmed) on a security video.
see also ↑high-security
2. uncountable + singular or plural verb 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. uncountable 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.
• Which type of investment offers the greatest security?

FEELING HAPPY/SAFE
4. uncountable 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. uncountable, countable 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. securitiesplural (finance)documents proving that sb is the owner of shares, etc. in a particular company
•government securities
see also ↑social security

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

Thesaurus:
security noun
1. U
•Airport security has been tightened.
protection • • cover • |BrE defence • |AmE defense •
adequate security/protection/defence
provide security/protection/defence/cover
2. U
•The plan offers your family financial security in the event of your death.
safety • • welfare • • well-being •
for security/safety
economic/financial/material security/welfare/well-being
improve security/safety/sb's welfare/sb's well-being
security or safety? In this meaning security is used especially about financial or emotional protection; safety is used especially about protection from physical harm or danger.

Collocations:
International relations
Trade
facilitate/regulate trade (with other countries)
form/join a trading bloc
live in/compete in a global/the world economy
support/promote free trade
adopt/call for/oppose protectionist measures
erect/impose/reduce/remove trade barriers
impose/lift/raise/eliminate import tariffs (on sth)
have/run a huge/large/growing trade surplus/deficit
embrace/resist/drive globalization
Politics and law
conduct/handle/talk about/discuss foreign policy
pursue an aggressive/a hawkish foreign policy
require/use/conduct diplomacy
establish/break off/sever/restore diplomatic relations
foster/promote/strengthen regional cooperation
facilitate/achieve economic/political integration
exercise/defend/protect/transfer/restore/regain national/state/full/limited sovereignty
consolidate/extend/lose/retain your power (in the region)
hold/maintain/change/alter/shift/be a shift in the balance of power (in the region)
cause/create/open/expose/heal/repair a deep/growing/major/serious rift between X and Y
Meetings and agreements
have/hold/host/attend an international conference/an economic forum/a G20 summit
launch a new round of global/multilateral/world trade negotiations
send/head/lead/meet a high-level/an official/a trade delegation
begin/start/continue/resume peace talks
be committed to/be opposed to/disrupt/undermine/derail/sabotage the peace process
negotiate/achieve a lasting political settlement
broker/sign a peace deal/agreement/treaty
Conflict
be/constitute/pose a threat to global security
compromise/endanger/protect national security
justify/be in favour of/ (especially US) be in favor of/be against military intervention
threaten/authorize/launch/take/support/oppose unilateral/pre-emptive military action
impose/enforce/lift/end economic sanctions/an arms embargo/a naval blockade
close/protect/secure/patrol the border
lead/be involved in a peacekeeping operation
Aid
negotiate/announce a $15 billion aid package/an economic stimulus package
send/provide/request/cut off military aid
bring/provide emergency/humanitarian relief
deliver/distribute medical supplies/(BrE) food parcels
fund/run a foreign/a local/an international NGO
reduce/eradicate child/global/world poverty

Example Bank:
•For security reasons, passengers are requested not to leave any luggage unattended.
•He clings to her like a security blanket.
•He gave her the emotional security she needed.
•He lost his security clearance because he failed a lie-detector test.
•His father agreed to stand security for his son's house-purchase loan.
•Screw windows to the frame for maximum security.
•She pledged her jewellery as security for a £50 000 loan.
•Soldiers stand at security checkpoints.
•The bank will make a loan against the security of the lender's house.
•The bars are to provide security against break-ins.
•The leaking of secrets from the Defence Ministry has compromised national security.
•The leaking of state secrets has compromised national security.
•The user will be lulled into a false sense of security.
•They have the security of a good home.
•Wall Street securities firms
•We need to tighten security around the hotel during the president's visit.
•a former national security adviser to President Clinton
•a law to protect national security
•a maximum security prison
•a securities lawyer with Tinson and Zelkins
•foreign ownership of US government securities
•our national security interests
•the faltering securities market
•He has the security of a good home and a loving family.
•Investigations are continuing into a security alert in the city yesterday.
•Job security is a thing of the past.
•She'd allowed herself to be lulled into a false sense of security.
•The criminals were caught on a security video.
•The demonstrations were brutally broken up by the security forces.
•The government claimed that the organization posed a threat to national security.
•The incident has provoked calls to tighten airport security.
•The plan offers your family financial security in the event of your death.
•The visit took place amidst tight security.