The state or quality of lasting forever; eternity. The concept of perpetuity is often discussed in philosophical debates about the universe.
A bond or other security with no fixed maturity date. Investors were interested in the perpetuity because it promised a steady stream of income indefinitely.
An annuity that continues indefinitely. The charity received a perpetuity that ensured it would have funds to operate for generations.
(Law) A restriction, trust, or limitation that prevents property from being transferred for a period longer than allowed by statute. The conveyance was struck down because it created a perpetuity that violated the rule against perpetuities.