n. The state of being insecure or unsafe; liability to give way, be lost, or become unsafe or fraught with danger; want of secureness or stability; instability; liability to damage or loss: as, the insecurity of a staircase or of a foundation.n. Lack of assurance or confidence, especially in regard to one's safety, or the security or stability of something; apprehensiveness of change, loss, or damage; doubt; uncertainty: as, a feeling of insecurity pervaded the community.