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security

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security/sɪˈkjɚrəti/noun
pluralsecurities
security
/sɪˈkjɚrəti/
noun
pluralsecurities
Learner's definition of SECURITY  
[noncount] 
: the state of being protected or safe from harm — often used before another noun
   b  : things done to make people or places safe
   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
   d  : the part of a company or other organization that provides protection for workers, equipment, etc.
[noncount]  : the state of being closely watched or guarded
[noncount]  : the state of being free from anxiety or worry : the state of being or feeling secure
[count] 
: something given as proof of a promise to make a payment later
   b  : a document showing that someone owns or has invested in a company, organization, etc.
— see also social security
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