Pĕr'pe-tū'i-ty, n.

n. [Lat. perpetuitas, Fr. perpétuité, Pr. perpetuitat, Sp. perpetuidad, It. perpetuità.] 1. The state or quality of being perpetual; endless duration; continued, uninterrupted existence, or duration for an indefinite period of time; as, the perpetuity of laws and institutions; the perpetuity of fame. Mortals who sought and found, by dangerous roads, A path to perpetuity of fame. Byron. The perpetuity of a single emotion is insanity. I. Taylor.

2. Something perpetual; that which continues indefinitely; a thing without end. South.
3. In the doctrine of annuities, the number of years in which the simple interest of any sum becomes equal to the principal; also, the sum which will purchase an annuity to continue forever.
4. The quality or condition of an estate by which it becomes inalienable, either perpetually or for a very long period; also, the estate itself so modified or perpetuated.