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TOEFL BNC: 632 COCA: 661
securitynounuk/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保护（措施）；安全（保障）

The station was closed for two hours because of a security alert.由于有安全警报，车站关闭了两小时。
30 demonstrators were killed in clashes with the security forces over the weekend.周末，30名示威者在与保安部队的冲突中丧生。
The tighter security measures/precautions include video cameras throughout the city centre.加强安全保障措施包括在市中心安装摄像头。
The students were deported because they posed a threat to national security.这些学生因对国家安全构成威胁而被驱逐出境。
The banks must tighten security against fraud.银行必须加强安全措施，防止诈骗。
The most dangerous criminals are held in maximum-security prisons (= prisons that are as difficult as possible to escape from).最为危险的罪犯被关押在戒备最森严的监狱里。

[ U, + sing/pl verb ] the group of people responsible for protecting a building保安人员

You'll need to notify security if you want to work late in the office.如果想在办公室里工作到很晚，你需要通知保安人员。

More examples

Why would a tenant agree to swap life-time security for a short-term lease?

You need some financial security when you have children.

Government bonds are a sound investment because they combine good profits and high security.

In this age of short-term contracts, job security often seems like a thing of the past.

If it's a choice between higher pay and job security, I'd prefer to keep my job.

security noun CERTAINTY

C1 [ U ] the fact that something is not likely to fail or be lost保障；牢靠

If it's a choice between higher pay and job security, I'd prefer to keep my job.如果在更高的薪酬和安稳的工作两者之间进行选择，我宁愿保住工作。
I'm on a temporary contract and have little financial security (= cannot be sure of having enough money to live on).我签的是临时合同，没什么经济保障。

security noun FINANCE

[ U ] property or goods that you promise to give to someone if you cannot pay what you owe them保证金；担保品

She used her shares in the company as security against a $23 million bank loan.她用自己在公司的股票作抵押向银行借了2300万美元。
The hotel held onto our suitcases as security while we went to the bank to get money to pay the bill.宾馆扣下我们的行李作为抵押，我们则去银行取钱来付账。
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证券；债券

security noun CONFIDENCE

C2 [ U ] the feeling of being confident in one's family and relationships（在家庭或一段关系中）安全感；安心

Most children need the security of a stable family life.大多数孩子需要稳定的家庭生活带来的安全感。
TOEFL BNC: 632 COCA: 661
security

noun¹

 1feeling safe/being free from worry安全感；安全無憂ADJECTIVE | VERB + SECURITY | SECURITY + NOUN | PHRASES ADJECTIVE➤greater更大的安全感▸➤emotional, psychological情感上的／心理上的安全感▸➤economic, financial經濟保障▸➤job就業保障▸➤energy, food能源／食物保障VERB + SECURITY➤have有安全感◇They have the security of a good home.他們擁有幸福家庭所帶來的安全感。➤give (sb), provide (sb with)給予（某人）安全感；（向某人）提供安全保障◇He gave her the emotional security she needed.他給了她所需要的情感上的安全感。SECURITY + NOUN➤blanket (= an object that a child holds in order to feel safe) (often figurative) 安慰毯；安慰物◇He clings to her like a security blanket.他像摟着安慰毯一樣緊緊摟着她。PHRASES➤a false sense of security虛假的安全感◇The user will be lulled into a false sense of security.使用者會被誤導以為安全無虞。➤a feeling of security, a sense of security安全感➤security of tenure (law法律, especially BrE) 職位的穩定性
security

noun²

 2to protect sb/sth from thieves, attack, war, etc.保障ADJECTIVE | VERB + SECURITY | SECURITY + NOUN | PREPOSITION | PHRASES ADJECTIVE➤heightened加強的安全措施▸➤strict, tight嚴格的／嚴密的安全措施▸➤lax鬆懈的安全措施▸➤collective集體安全▸➤domestic, homeland, internal, national, state國家安全；國內治安➤airline, airport, aviation航空安全；機場安全➤border, port邊境／港口安全▸➤personal人身安全▸➤home家庭安全➤computer, data, information, Internet, network計算機／數據／信息／因特網／網絡安全➤long-term長期安全保障VERB + SECURITY➤provide (sb with)（向某人）提供安全保障▸➤ensure, guarantee確保／保障安全➤protect保障安全◇a law to protect national security保障國家安全的法律➤beef up (informal) , improve, increase, strengthen, tighten, tighten up加大安全力度；改進安全措施；加強安全保障；增強保安措施◇We need to tighten security around the hotel during the president's visit.總統訪問期間我們需要加強賓館周圍的安全保衞。➤compromise, endanger, jeopardize, threaten, undermine危及安全；威脅安全；破壞安全◇The leaking of state secrets has compromised national security.國家機密的泄露危及了國家安全。SECURITY + NOUN➤apparatus, forces, services安全機構；安全部隊▸➤adviser, expert, guard, man, officer, official, personnel, staff安全顧問；安全專家；保安；安全官員；保安人員◇a former national security adviser to President Clinton克林頓總統的前國家安全顧問➤arrangements, matters, measures, policy, system安全安排／事務／措施／政策／體系➤issue, situation安全問題／形勢➤concerns, interests安全隱患／利益◇our national security interests我們國家的安全利益➤risk, threat危險分子；安全威脅➤breach違反安全規定▸➤check安全檢查➤checkpoint安全檢查站◇Soldiers stand at security checkpoints.士兵守衞在安全檢查站。➤clearance安全審查許可◇He lost his security clearance because he failed a lie-detector test.他未能通過測謊，因此沒有通過安全審查。➤camera, device, van, video監控攝像頭；安保設施；警車；監控錄像PREPOSITION➤security against防備⋯的安全措施◇The bars are to provide security against break-ins.這些鐵條是為了防止盜賊進入。PHRASES➤for security reasons出於安全原因◇For security reasons, passengers are requested not to leave any baggage unattended.為安全起見，請旅客們注意照看好自己的行李。➤a high level of security高級別安全措施➤peace and security和平與安全➤a threat to security安全威脅
security

noun³

 3 (especially BrE) when you borrow money借錢VERB + SECURITY | PREPOSITION VERB + SECURITY➤put up (sth as)抵押（⋯）➤use sth as用⋯作抵押▸➤hold (sth as), take (sth as)接受（⋯作為）抵押PREPOSITION➤against the security of以⋯為抵押◇The bank will make a loan against the security of the lender's house.銀行將會憑藉款人的住房抵押提供貸款。➤as security作為抵押◇She pledged her necklace as security for a loan.她用項鏈作抵押申請貸款。➤security for⋯的抵押
security

noun⁴

 4securities financial documents證券ADJECTIVE | VERB + SECURITIES | SECURITIES + NOUN ADJECTIVE➤agency, company, corporate, government, Treasury (especially NAmE) 機構證券；公司證券；政府證券；國庫券◇foreign ownership of US government securities美國政府證券的外國持有者➤foreign (especially NAmE) 外國證券▸➤gilt-edged, high-yield, top-rated金邊／高收益／最高信用評級的證券➤long-term, short-term長期／短期證券VERB + SECURITIES➤issue發行證券▸➤buy, purchase購買證券▸➤sell出售證券➤trade交易證券SECURITIES + NOUN➤company, firm證券公司◇Wall Street securities firms華爾街證券公司➤market證券市場◇the faltering securities market衰落的證券市場➤broker, lawyer證券經紀人／律師◇a securities lawyer with Tinson and Zelkins天信公司的證券律師
TOEFL BNC: 632 COCA: 661
security noun
⇨ security (airport security) ⇨ safety (job security) security

noun

security ♦︎ protection ♦︎ defence ♦︎ coverThese are all words for a situation where sb/sth is protected by sb/sth. 这些词均表示保护、防御、掩护。PATTERNS AND COLLOCATIONS 句型和搭配◆protection / defence from / of / against sth◆adequate security / protection / defence◆effective protection / defence◆to provide security / protection / defence / cover■ security sɪˈkjʊərəti; NAmE səˈkjʊrəti [uncountable] the activities involved in protecting a country, building or person against attack or danger 保护措施；安全工作◆The incident has provoked calls to tighten airport security.该事件引发了加强机场安全措施的呼声。◆The government claimed that the organization posed a threat to national security (= the defence of a country).政府声称该组织对国家安全构成了威胁。◆The visit took place amidst tight security (= the use of many police officers).访问是在戒备森严的情况下进行的。◆The demonstrations were brutally broken up by the security forces (= the police, army, etc.).游行示威遭到安保部队的粗暴制止。◆Investigations are continuing into a security alert in the city yesterday.对昨天在该市发出安全警报一事的调查仍在进行中。  see also secure ⇨ protect ■ protection [uncountable] (rather formal) the act of protecting sb/sth against injury, damage, attack, danger or being used in the wrong way; the state of being protected in this way 保护；防卫◆Remember to bring clothes that provide adequate protection against the wind and rain.记着带上足以遮风挡雨的衣服。◆He asked to be put under police protection.他请求警方保护。◆She acknowledged that much work needs to be done to improve data protection laws.她承认在完善数据保护法规方面还有许多工作要做。  see also protect ⇨ protect , protective ⇨ protective ■ defence (BrE) (NAmE defense) [uncountable] the act of protecting sb/sth against attack or criticism 防御；保护；保卫◆He paid tribute to all those who had died in defence of their country.他高度赞扬了所有为保卫祖国而献身的人。◆What points can be raised in defence of this argument?能提出什么论点来为这种说法辩护呢？◆When her brother was criticized she leapt to his defence.她的弟弟受到批评时，她马上跳出来袒护他。◆He has shown courage in coming to the defence of the embattled president.在保护处境艰难的总统时，他表现得十分勇敢。ⓘ Self-defence is the act of doing or saying sth to protect yourself when you are being attacked or criticized. * self-defence指在遭到攻击或批评时以行动或言辞来保护自己的行为◆The man later told police that he was acting in self-defence.后来那人对警察说他当时是在自卫。   see also defend ⇨ explain 2 ■ cover [uncountable] support and protection that is provided when sb is attacking or in danger of being attacked 掩护；防护◆The ships needed air cover (= protection by military planes) once they reached enemy waters.这些船只一旦进入敌方水域就需要空中掩护。
TOEFL BNC: 632 COCA: 661
security
Safe and harmless: safe, harmless, secure...
The practice or process of protecting: protection, sanctuary, safekeeping...
Departments in companies and organizations: acquisitions, arm, back office...
Feelings of confidence and pride: confidence, pride, assurance...
Relating to borrowing money and owing money: borrowing, borrowing powers, call it quits...

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