Word.ws English Dictionary

Plural of infinity

regular plural

The plural of infinity is infinities.

Forms of infinity

Singularinfinity /ɪnˈfɪnɪti/
Pluralinfinities
Countablecountable and uncountable

Infinities in a sentence

  • 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.2012 January, Michael Riordan, “Tackling Infinity”, in American Scientist, volume 100, number 1, archived from the original on 30 Apr 2013...
  • I attended conferences on the problem of infinities in the renormalisable theories.1997, Ian McEwan, Enduring Love, Vintage (1998), page 77. From the entry renormalisable
  • That is not the case with collectional infinities.2022, Stetson J. Robinson, The Correspondence of Charles S. Peirce and the Open Court Publishing Company, 1890–1913, page 493. From the entry collectional
  • Getting rid of these nagging infinities has probably occupied far more effort than was spent in originating the theories.2012 January, Michael Riordan, “Tackling Infinity”, in American Scientist, volume 100, number 1, New Haven, Conn.: Sigma Xi, the…. From the entry gravity
  • See the Brahmins sitting under the mat umbrellas by the river-bank, looking out across the sunlit river into infinities of space!1931, Lowell Thomas, India, Land of the Black Pagoda, page 213. From the entry morning-land

Meaning of infinity

  1. noun Endlessness, unlimitedness, absence of a beginning, end or limits to size.
  2. noun A number that has an infinite numerical value that cannot be counted.
  3. noun An idealised point which is said to be approached by sequences of values whose magnitudes increase without bound.

Full definition of infinity

Questions about the plural of infinity

What is the plural of infinity?
The plural of infinity is infinities.
Is infinity countable?
Infinity is a countable and uncountable noun.

Source and license

Adapted from Wiktionary: infinity (page history and authors) and the entries of its forms. Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws left out forms marked obsolete, archaic, rare or dialectal and added the examples. Wiktionary data of 2026-09-02.

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