In'se-cū'ri-ty2, n.volume_upnounn. [Prefix in, not, and security; L. Lat. insecuritas, Fr. insécurité.]The condition of being insecure; want of safety; danger; hazard; as, the insecurity of a building liable to fire, or of a debt. Want of confidence in safety; as, seamen in a tempest must be conscious of their insecurity. Want of confidence in one's opinion.