Noun

(uncountable) The quality or state of being perpetual; endless duration; uninterrupted existence.

(countable) Something that is perpetual.

(countable, legal) A limitation intended to be unalterable and of indefinite duration; a disposition of property which attempts to make it inalienable beyond certain limits fixed or conceived as being fixed by the general law.

(countable, finance) An annuity in which the periodic payments begin on a fixed date and continue indefinitely.

Noun

(label) Endlessness, unlimitedness, absence of end or limit.

A number that has an infinite numerical value that cannot be counted.

* {{quote-magazine, date=2012-01

, author=Michael Riordan , title=Tackling Infinity , volume=100, issue=1, page=86 , magazine= citation , passage=Some of the most beautiful and thus appealing physical theories, including quantum electrodynamics and quantum gravity, have been dogged for decades by infinities' that erupt when theorists try to prod their calculations into new domains. Getting rid of these nagging ' infinities has probably occupied far more effort than was spent in originating the theories.}}

An idealised point which is said to be approached by sequences of values whose magnitudes increase without bound.

(label) A number which is very large compared to some characteristic number. For example, in optics, an object which is much further away than the focal length of a lens is said to be "at infinity", as the distance of the image from the lens varies very little as the distance increases further.

(label) The symbol .