/perr'pi tooh"i tee, -tyooh"-/ , n. , pl. perpetuities .
1. the state or character of being perpetual (often prec. by in ): to desire happiness in perpetuity.
2. endless or indefinitely long duration or existence; eternity.
3. something that is perpetual.
4. an annuity paid for life.
5. Law. an interest under which property is less than completely alienable for longer than the law allows.
[ 1375-1425; late ME perpetuite perpetuitas. See PERPETUAL, -ITY ]