Annuity may refer to: Annuity (finance theory), any recurring periodic series of payments Annuity (financial contracts), an insurance-like contract providing annual payments Annuity (US financial products) Annuity (European financial arrangements) Life annuity (also single payment annuity), a financial contract providing payments for a person's lifetime Annuity, a maintenance fee (patent) in patent law. An annuity that has no definite end is called a perpetuity.… (More on Annuity)