Entry Word: security

Function: noun

Meaning: 1 means or method of defending <measures taken to beef up our national security> — see defense 1
2 something given or held to assure that the giver will keep a promise <he left his credit card as a security that he'd return the car> — see pledge 1
3 the state of not being exposed to danger <only a search of the entire room for monsters would reassure the child of her security> — see safety 1