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TOEFL BNC: 632 COCA: 661

security
security /sɪˈkjɚrəti/ noun
plural securities
security
/sɪˈkjɚrəti/
noun
plural securities
Learner's definition of SECURITY
1 
[noncount]
a  : the state of being protected or safe from harm安全；平安
— often used before another noun常用于另一名词前
b  : things done to make people or places safe保安；治安措施
c  : the area in a place (such as an airport) where people are checked to make sure they are not carrying weapons or other illegal materials安检处
d  : the part of a company or other organization that provides protection for workers, equipment, etc.保安部门
2 
[noncount] : the state of being closely watched or guarded密切注视；严密保护
3 
[noncount] : the state of being free from anxiety or worry : the state of being or feeling secure无忧无虑；有保障
4 
[count]
a  : something given as proof of a promise to make a payment later保证金；抵押品
b  : a document showing that someone owns or has invested in a company, organization, etc.证券；债券
— see also social security
TOEFL BNC: 632 COCA: 661

security

noun

se·​cu·​ri·​ty si-ˈkyu̇r-ə-tē How to pronounce security (audio)
-ˈkyər-
plural securities
1
: the quality or state of being secure: such as
a
: freedom from danger : safety
b
: freedom from fear or anxiety
c
: freedom from the prospect of being laid off
job security
2
a
: something given, deposited, or pledged to make certain the fulfillment of an obligation
b
: surety
3
: an instrument of investment in the form of a document (such as a stock certificate or bond) providing evidence of its ownership
4
a
: something that secures : protection
b(1)
: measures taken to guard against espionage or sabotage, crime, attack, or escape
(2)
: an organization or department whose task is security

Synonyms

Example Sentences

We must insure our national security. The college failed to provide adequate security on campus after dark. There was a lapse in security and the inmates escaped. We have to go through security at the airport. We called security when we found the door open. The meeting was held under tight security. The prisoner was being kept under maximum security. I like the security of knowing there will be someone there to help me when I need help. Growing up in a close family gave her a sense of security. See More
Recent Examples on the Web The short film follows a fictional Buckingham Palace break-in, when an intruder sneaks into the Queen's room for a chat while her security guard is taking the corgis for a walk. Diana Pearl, Peoplemag, 8 Sep. 2022 The security guard was taken to a hospital with cuts to his left leg. Pilar Arias | Fox News, Fox News, 6 Sep. 2022 After Korkmaz ‒ who also plays for the Philadelphia 76ers ‒ left the court, multiple Georgia players and a security guard allegedly went after him in the tunnel. Scott Horner, The Indianapolis Star, 6 Sep. 2022 The two embassy employees who were killed were identified by the Russian government as a diplomat and a security guard, and Zadran said at least 10 others were injured along with the four civilians who died. Christina Goldbaum, BostonGlobe.com, 5 Sep. 2022 The Investigative Committee said that preliminary information confirmed that the two Russians killed were the embassy’s second secretary and an embassy security guard. Ann M. Simmons, WSJ, 5 Sep. 2022 However, the security of supply was almost a secondary goal compared to the eagerness to drive a fair, low price for supplies. WIRED, 28 Aug. 2022 In a Disney call center, as a security guard and driving the buses. Gabrielle Calise, Orlando Sentinel, 28 Aug. 2022 Inside, an earpiece-wearing security guard politely organizes a line snaking through the lobby—a scene more often found outside clubs below 14th Street. Kareem Rashed, Robb Report, 28 Aug. 2022 See More

Word History

First Known Use

15th century, in the meaning defined at sense 1

Time Traveler
The first known use of security was in the 15th century

Phrases Containing security

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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

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