an ‧ nu ‧ i ‧ ty /əˈnjuːəti, əˈnjuːɪti $ əˈnuː-/ BrE AmE noun ( plural annuities ) [countable]
[ Date: 1400-1500 ; Language: French ; Origin: annuité , from Medieval Latin annuitas , from Latin annuus ; ⇨ ↑ annual 1 ]
a fixed amount of money that is paid each year to someone, usually until they die