perpetuity

perpetuity is a Noun

Definition:

[1] The quality or state of being perpetual; as, the perpetuity of laws. Bacon. A path to perpetuity of fame. Byron. The perpetuity of single emotion is insanity. I. Taylor.

[2] Something that is perpetual. South.

[3] Endless time. "And yet we should, for perpetuity, go hence in debt." Shak.

[4] The number of years in which the simple interest of any sum becomes equal to the principal.

[5] The number of years` purchase to be given for an annuity to continue forever.

[6] A perpetual annuity.

[7] Duration without limitations as to time.

[8] 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.