Perpetuity

n. eternity, infinity, forever; continuity, everlastingness; never-ending annuity, continuous pension

Simple Description A perpetuity is an annuity that has no definite end, or a stream of cash payments that continues forever. There are few actual perpetuities in existence (although the British government has issued them in the past, and they are known and still trade as consols). A number of types of investments are similar to perpetuities, such as real estate, and the technique for valuing a perpetuity is often useful. Perpetuities are one of the time value of money methods for valuing financial assets.
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Noun
1. the property of being perpetual (seemingly ceaseless)
(synonym) sempiternity
(hypernym) permanence, permanency

(n.)
The quality or state of being perpetual; as, the perpetuity of laws.
  

(n.)
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.
  

(n.)
The number of years' purchase to be given for an annuity to continue forever.
  

(n.)
The number of years in which the simple interest of any sum becomes equal to the principal.
  

(n.)
Something that is perpetual.
  

(n.)
Endless time.
  

(n.)
Duration without limitations as to time.
  

(n.)
A perpetual annuity.
  

A constant stream of identical cash flows without end, such as a British consol.