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se·cu·ri·ty Listen to audio/sɪˈkjɚrəti/ noun
plural se·cu·ri·ties
1 [noncount] a : the state of being protected or safe from harm
We must insure our national security.often used before another noun an electronic security system random security checks security measures
b : things done to make people or places safe
The college failed to provide adequate security on campus after dark. increased security at airports There was a lapse in security and the inmates escaped.
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
We have to go through security at the airport.
d : the part of a company or other organization that provides protection for workers, equipment, etc.
We called security when we found the door open.
2 [noncount] : the state of being closely watched or guarded
The meeting was held under tight security. The prisoner was being kept under maximum security.
3 [noncount] : the state of being free from anxiety or worry : the state of being or feeling secure
financial security She is concerned about job security. [=about the possibility of losing her job] 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.
4 [count] a : something given as proof of a promise to make a payment later
security for a loan
b : a document showing that someone owns or has invested in a company, organization, etc.
government securities
— see also social security

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