■ noun ( plural annuities ) a fixed sum of money paid to someone each year, typically for the rest of their life.
↘a form of insurance or investment entitling the investor to a series of annual sums.
Derivatives
annuitize or annuitise verb
Origin
ME: from Fr. annuité , from med. L. annuitas , from L. annuus 'yearly', from annus 'year'.