infinity

noun

in·​fin·​i·​ty in-ˈfi-nə-tē How to pronounce infinity (audio)
plural infinities
1
a
: the quality of being infinite
b
: unlimited extent of time, space, or quantity : boundlessness
2
: an indefinitely great number or amount
an infinity of stars
3
a
: the limit of the value of a function or variable when it tends to become numerically larger than any preassigned finite number
b
: a part of a geometric magnitude that lies beyond any part whose distance from a given reference position is finite
do parallel lines ever meet if they extend to infinity
c
: a transfinite number (such as aleph-null)
4
: a distance so great that the rays of light from a point source at that distance may be regarded as parallel

Examples of infinity in a Sentence

The view tapers off into infinity. a series of numbers that continues to infinity The night sky was filled with an infinity of stars.
Recent Examples on the Web Wide Glass gets its name from its all-glass lens, a 90mm f/8 prime that can focus from 11.8 inches (0.3 meters) to infinity. PCMAG, 23 Oct. 2024 The authors of the paper contend that when the Beveridge threshold is breached, the Phillips curve percentage of wage increases are almost vertical, tending almost to infinity. Vipin Bharathan, Forbes, 17 Sep. 2024 To the best mathematicians can tell, the actual number of primes bounces slightly above and below this curve up to infinity. Byzack Savitsky, science.org, 29 July 2024 But another great Greek thinker, Archimedes, argued that in this case, a distinction had to be made between different infinities: an infinitely large category on the one hand and a finite continuum on the other. Manon Bischoff, Scientific American, 30 July 2024 See all Example Sentences for infinity 

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'infinity.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History

Etymology

Middle English infinite, borrowed from Anglo-French infinité, borrowed from Latin infīnitāt-, infīnitās, from in- in- entry 1 + fīnis "boundary, limit, terminal point, ending" + -itāt-, -itās -ity — more at final entry 1

First Known Use

14th century, in the meaning defined at sense 1a

Time Traveler
The first known use of infinity was in the 14th century

Dictionary Entries Near infinity

Cite this Entry

“Infinity.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/infinity. Accessed 3 Nov. 2024.

Kids Definition

infinity

noun
in·​fin·​i·​ty in-ˈfin-ət-ē How to pronounce infinity (audio)
plural infinities
1
a
: the quality of being infinite
b
: a space, quantity, or period of time that is without limit
2
: an indefinitely great number or amount
3
: a point infinitely far away
Etymology

Middle English infinite "the quality of having no limit," from early French infinité (same meaning), derived from Latin infinitus (adjective) "having no limit," from in- "not" and finitus, past participle of finire "to limit, bring to an end," from finis "end, limit" — related to define, final, finish

More from Merriam-Webster on infinity

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