Definition - What does Certain Annuity mean?
A certain annuity is a policy in which the length of time and the scheduled payout are determined by the annuitant.
Insuranceopedia explains Certain Annuity
A certain annuity allows the annuitant to choose the number of years over the course of which they will receive funds, or be annuitized. If the annuitant dies during the payout period, the remaining funds will be paid out to their beneficiary or estate.