securesecuresecuressecuredsecuringadjective1If you are secure, you feel safe and you are not worried: Do you feel secure about the future?oppositeinsecure2safe: Don't climb that ladder – it's not very secure (= it may fall).Her job is secure (= she will not lose it).3well locked or protected so that nobody can go in or out: This gate isn't very secure.▶ securelyadverb: Are all the windows securely closed?