mid-15c., "condition of being secure," from Latin securitas, from securus "free from care" (see secure). Replacing sikerte (early 15c.), from an earlier borrowing from Latin; earlier in the sense "security" was sikerhede (early 13c.); sikernesse (c. 1200).
Meaning "something which secures" is from 1580s; "safety of a state, person, etc." is from 1941. Legal sense of "property in bonds" is from mid-15c.; that of "document held by a creditor" is from 1680s. Phrase security blanket in figurative sense is attested from 1966, in reference to the crib blanket carried by the character Linus in the "Peanuts" comic strip (1956).
实用例句
1. It's an open secret that the security service bugged telephones.
安全部门窃听电话是人人皆知的秘密。
来自柯林斯例句
2. Today's Security Council resolution will be a significant success for American diplomacy.
今天的安理会决议对于美国外交而言是一次重大的成功。
来自柯林斯例句
3. Wherever they went they were closely followed by security men.
不管上哪儿，保安人员都紧跟在他们身后。
来自柯林斯例句
4. The exact locations are being kept secret for reasons of security.
确切地点因为安全原因要保密。
来自柯林斯例句
5. The security zone was set up to prevent guerrilla infiltrations.