Definition of security in English:



  • 1mass noun The state of being free from danger or threat.

    ‘the system is designed to provide maximum security against toxic spills’
    ‘job security’
    • ‘They will give increased security of tenure for the tenants of agricultural holdings.’
    • ‘What should we be doing to ensure vaccine safety and security against external threats?’
    • ‘As in London, the force's chiefs said they hoped to balance security against people's rights to protest peacefully.’
    • ‘A new University of Queensland research project could lead to improved internal computer network security at banks and financial institutions.’
    • ‘If you can't budget effectively, you endanger your financial security by spending more than you earn.’
    • ‘According to him however, Government has to guarantee security against international threats.’
    • ‘A notch in the rear dovetail provides additional security against ring movement.’
    • ‘State policy for ensuring information security during military conflicts has a prognostic, organizational and administrative function.’
    • ‘The Green Revolution ensured food security at the macro level, but not completely at the household level.’
    • ‘What are the recent scientific and technological developments that enhance aviation security?’
    • ‘Having a job did not necessarily guarantee economic security for African American workers and their families.’
    • ‘With it, you can improve Internet security for remote workers.’
    • ‘Other costs include the introduction of bio security against bird flu.’
    • ‘The only true security against nuclear dangers is an enforceable ban on all nuclear weapons.’
    • ‘But it can make major strides to bolster the country's financial security.’
    • ‘Colonialism is no longer seen as a threat to peace and security since there are no more empires left.’
    • ‘Fallback resources provide security against errors in other setting mechanisms.’
    • ‘He has ensured security of tenure for those whom he has backed.’
    • ‘They would all have more cash to provide job security and job creation.’
    • ‘The US Food and Drug Administration announced rules today that will enhance the security of the US food supply.’
    protection, defence, guard, shelter, screen, buffer, preventive, precaution, prophylactic, provision, safety measure, surety, cover, insurance, indemnity
    certainty, safe future, assured future, safety, reliability, dependability, solidness, soundness
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    1. 1.1 The safety of a state or organization against criminal activity such as terrorism, theft, or espionage.
      ‘a matter of national security’
      • ‘Tony Blair was warned six years ago that religious fanaticism would become a serious threat to UK security, it has been revealed.’
      • ‘Only in retrospect did we become aware how lax US airport security had become.’
      • ‘Wealth is therefore an instrument in the creation of national security and national welfare.’
      • ‘So therefore, an educational system, based on reason, is a vital matter of national security.’
      • ‘But the role of the Government is also to provide safety and security for its citizens.’
      • ‘Nicknamed the Jersey Girls, they became experts on national security and terrorism.’
      • ‘A second factor relates to reputedly lax physical security and accounting systems at many nuclear weapons enterprises.’
      • ‘How exactly does all this improve U.S. national security for the long haul?’
      • ‘There is no such thing as complete security against crime, or against terrorism.’
      • ‘She complained about the country's lax security and lauded John Kerry for his defiance of the President.’
      • ‘That ability made him not only a danger in the region but a threat to America's security.’
      • ‘Our nation's security is not just the responsibility of the armed forces.’
      • ‘The war was not justifiable on grounds of an immediate threat to US security.’
      • ‘None of these three countries poses a real threat to United States security.’
      • ‘The National Party considers matters of national security to be of the highest importance.’
      • ‘What is the director of homeland security for, other than to announce threats to homeland security?’
      • ‘One of the first matters is the need to assist aviation safety and security.’
      • ‘Dealing with national security is always a matter for the executive, and that is how it should be.’
      • ‘President Bush put terrorism and national security at the center of congressional races.’
      • ‘Terrorism has long been included on the list of so-called new transnational threats to state security.’
      safety, freedom from danger
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    2. 1.2 Procedures followed or measures taken to ensure the security of a state or organization.
      ‘amid tight security the presidents met in the Colombian resort’
      • ‘Indonesia's military and police are providing tight security for the team during its trip.’
      • ‘A huge team of people will ensure that the necessary security measures are in place.’
      • ‘City institutions were just told to make sure that their existing checks and security procedures were working.’
      • ‘The Security Council gave new authority to Mr Mehlis, who returned on Monday to Lebanon amid tight security.’
      • ‘A council will look at ways to fund extra security measures at cemeteries after 14 headstones were kicked over.’
      • ‘More rush on the tracks would of course entail more security measures.’
      • ‘He has been campaigning for more than a year for tighter security at the site.’
      • ‘All the fuss, tight security and checks led to long waits and traffic snarls.’
      • ‘You will have a virtual free rein to provide security as you see fit.’
      • ‘The players touched down in New Delhi at 1430 hours on a PIA flight amid tight security arrangements.’
      • ‘Both exports and imports fell in part because of tighter security measures.’
      • ‘Elea then set up a series of security measures to ensure that sure an occurrence could never happen again.’
      • ‘We must ensure there are tight security controls at the venue and at the athletes' accommodations.’
      • ‘Smith landed at Manchester Airport just after midday amid tight security and a blizzard.’
      • ‘Border security was tightened just as the U.S. slowdown was forcing legions of migrants to return to Mexico.’
      • ‘Once in place, said Moynihan, it's crucial that tight security procedures and policies are maintained.’
      • ‘In the short run, America will tighten border security.’
      • ‘The governor came to the temple with his wife, amid tight security.’
      • ‘Indonesian Christians will celebrate Christmas amid a tight security in the world's most populous Muslim country.’
      • ‘At Stansted, armed guards lined the access road to the terminal which was closed for five hours amid heightened security measures.’
      safety measures, safeguards
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    3. 1.3 The state of feeling safe, stable, and free from fear or anxiety.
      ‘the emotional security of being the one special person that someone else loves’
      • ‘For one thing, we are afraid, and in times of fear we crave security above all.’
      • ‘You are able to drop old fears and apprehension about material and emotional security.’
      • ‘Small flechette pistols were sold to give civilians a sense of false security against thugs.’
      • ‘The problems could relate to declining health, declining income or declining emotional security.’
      • ‘A deep sense of insecurity grips you and you begin to clutch at emotional and material security.’
      feeling of safety, feeling of ease, absence of anxiety, absence of worry, peace of mind, freedom from doubt, certainty, happiness, comfort, confidence
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  • 2A thing deposited or pledged as a guarantee of the fulfilment of an undertaking or the repayment of a loan, to be forfeited in case of default.

    • ‘David has offered the Ace Patent to me as security against this money, which, quite frankly, I am not prepared to accept.’
    • ‘If the bank does not get security against the borrower itself, it is difficult to see how it gets it against third parties.’
    • ‘The money was being used as security for costs until the appeal was completed.’
    • ‘The whole business of pledging - parting with goods to act as security against a loan - is also changing, Kempson said.’
    • ‘The plaintiffs say that this property could be put up for security for costs.’
    guarantee, collateral, surety, pledge, bond
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  • 3often securitiesA certificate attesting credit, the ownership of stocks or bonds, or the right to ownership connected with tradable derivatives.

    • ‘As we mentioned earlier convertible bonds are rather complex securities for a few reasons.’
    • ‘Finally, you can gift shares and other financial securities to charity and get tax relief on their market value.’
    • ‘Most securities that trade this way are penny stocks or are from very small companies.’
    • ‘These are pooled investment funds which give access to a wide spread of shares and other securities such as bonds.’
    • ‘The securities trade like stocks when the price of common shares moves above the conversion price.’
    • ‘Already we have seen how important are the securities and derivatives activities of modern banks.’
    • ‘Instead, I propose to levy a small tax on transactions in securities on stock exchanges.’
    • ‘For those with an interest in individual securities, there are stocks and bonds to meet every need.’
    • ‘The Fed uses this cash to purchase securities from primary government bond dealers.’
    • ‘The new rules also make donating mutual funds, stocks, bonds and other securities more attractive.’
    • ‘One should remember that most of the option theory was developed for financial securities.’
    • ‘An adviser executive sells mutual funds, bonds and other related securities to customers.’
    • ‘Most of these securities were financed by British and Dutch investors.’
    • ‘Junk bonds or high yield bonds are securities issued by companies that aren't in the best of health.’
    • ‘The duration of gilts, bonds and interest bearing securities will not exceed 2 years.’
    • ‘Most of the respondents had experience in investing in the stock market and other securities.’
    • ‘A mutual fund firm invests in a broad range of stocks or other securities on behalf of a large number of individual clients.’
    • ‘It was mainly leverage created by borrowing to finance securities purchases back then.’
    • ‘But before you go and register all your securities into joint ownership, there is a catch.’
    • ‘Generally, you shouldn't have more securities in your portfolio than you can keep track of effectively.’
    investments, shares, holdings, securities, equities, bonds
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  • on security of something

    • Using something as a guarantee.

      ‘strict conditions attached to loans made on security of goods remaining the property of the borrowers’
      • ‘They could lend on security of shares and stocks held by jobbers to allow them to settle differences at the fortnightly settlements.’
      • ‘Their money has gone to a particular borrower, on security of a particular property, with a particular mortgage.’


Late Middle English: from Old French securite or Latin securitas, from securus ‘free from care’ (see secure).