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 .

Noun

(uncountable) The state or quality of being, or appearing to be, everywhere at once; actual or perceived omnipresence.

* {{quote-magazine, date=2013-07-26, author=(Leo Hickman)

, volume=189, issue=7, page=26, magazine=(The Guardian Weekly) , title= How algorithms rule the world , passage=The use of algorithms in policing is one example of their increasing influence on our lives. And, as their ubiquity spreads, so too does the debate around whether we should allow ourselves to become so reliant on them – and who, if anyone, is policing their use.}}

(countable, sciences) Anything that is found to be ubiquitous within a specified area.