1. 불가산 (물리적, 정신적, 경제적) 안도감, 안심; 안전, 안전 보장, 안보 (The condition of not being threatened, especially physically, psychologically, emotionally, or financially.)
the U.S.-Japan security alliance 미-일간 안보 동맹
2. 가산 보호, 보장 (Something that secures.)
3. (큰 기업・조직의) 경비 담당 부서 (An organization or department responsible for providing security by enforcing laws, rules, and regulations as well as maintaining order. )
There is a security guard on duty 24 hours a day. ― Do all the visitors have to sign in? 경비원이 24시간 근무하고 있을 겁니다. ― 모든 방문객들이 들어갈 때 서명을 해야 하나요?