Definition of Insurance 1. Promise of reimbursement in the case of loss; paid to people or companies so concerned about hazards that they have made prepayments to an insurance company Noun 2. Written contract or certificate of insurance Noun 3. Protection against future loss Noun Synonyms for word "insurance" Semanticaly linked words with "insurance" Hyponims for word "insurance" Lexical Analysis for "insurance" insure protect by insurance take out insurance for has derived form insure etymology coinsurance etymology insurancelike etymology insurancer etymology microinsurance etymology noninsurance etymology reinsurance etymology underinsurance etymology uninsurance etymologically related PITI payment etymologically related automobile insurance etymologically related car insurance etymologically related casualty insurance etymologically related credit insurance etymologically related earthquake insurance etymologically related fire insurance etymologically related flood insurance etymologically related freight insurance etymologically related group insurance etymologically related health insurance etymologically related insure is derived from insurances