security
/sɪˈkjuərətɪ; sɪ`kjʊrətɪ/ n
1 [U] freedom or protection from danger or worry 安全; 保护; 保障
children who lack the security of a good home 缺乏良好家庭照顾的儿童
have the security of a guaranteed pension 有保证可获养老金的保障.
2 [U] measures taken to prevent spying, attacks, theft, etc （防刺探、 攻击、 偷盗等的）安全措施
There was tight security for the Pope's visit, eg Many police officers guarded him. 为教皇到访采取了严密的保安措施.
We need greater security in car parks. 我们需要加强停车场的安全措施.
national security, ie the defence of a country 国家的防卫
[attrib 作定语]
security forces, eg police, troops, etc fighting terrorism 保安部队
a security van, eg for transporting money 保安车（如解送金钱的）
a high security prison, ie for dangerous criminals 戒备森严的监狱.
3 [C, U] jewellery, insurance policies, etc that can be used to guarantee that one will pay back borrowed money or keep a promise 抵押品
lend money on security, ie in return for sth given as security 收取抵押品贷出款项
give sth as
(a) security 以某物作抵押. Cf 参看 guarantee1 1.
4 securities [pl]
documents or certificates showing who owns stock, bonds, shares, etc 证券
government securities, ie for money lent to a government 政府证券.