infinity

noun
in·​fin·​i·​ty | \ in-ˈfi-nə-tē How to pronounce infinity (audio) \
plural infinities

Definition of infinity

1a : 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
3a : 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

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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.
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Recent Examples on the Web

The mirrors align to bounce images and create infinity views. Scott Ostler, SFChronicle.com, "Chase Center evaluated by Feng Shui expert," 6 Sep. 2019 Mr Adger does not just celebrate language’s infinity. The Economist, "A new book spells out the magic of language," 22 Aug. 2019 Their encounter, facilitated by time travel and infinity stones, is one of the mega-movie’s most poignant moments. Elena Nicolaou, refinery29.com, "Little House, Big Fans: These People Really, Really Love Laura Ingalls Wilder," 24 Aug. 2019 The spa encompasses an athletic club, a steam room, a sauna, three infinity hot tubs, a full-service salon and 14 treatment rooms. Sarah Kuta, The Know, "Serious self-care: A guide to Colorado’s must-visit spas," 30 July 2019 To infinity and beyond On that July day in 1969, a Scottsdale high schooler also was glued to his TV set watching the moon landing broadcast, which was made possible by Miller and his coworkers. Kyra Haas, azcentral, "Scottsdale Motorola workers made devices that transmitted famous words and images from the moon," 17 July 2019 Density variations form an inverted bell curve, where differences between regions approach not zero, but infinity. Natalie Wolchover, WIRED, "Cosmologists Clash Over the Beginning of the Universe," 16 June 2019 Jimmy Kimmel's son Billy had to undergo two heart surgeries after he was born with a congenital heart condition To infinity and beyond! Helen Murphy, PEOPLE.com, "So Sweet! Jimmy Kimmel Brings His Family, Including Son Billy, 2, to Toy Story 4 Premiere," 12 June 2019 Are all these bands jamming toward infinity or oblivion? Chris Richards, Washington Post, "After a long, strange trip ... all your indie faves are jam bands now," 6 June 2019

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'infinity.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of infinity

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

History and Etymology for infinity

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

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Learn More about infinity

Statistics for infinity

Last Updated

13 Sep 2019

Look-up Popularity

Time Traveler for infinity

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

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More Definitions for infinity

infinity

noun

English Language Learners Definition of infinity

: the quality of having no limits or end : the quality of being infinite
: a space, amount, or period of time that has no limits or end
: a very great number or amount

infinity

noun
in·​fin·​i·​ty | \ in-ˈfi-nə-tē How to pronounce infinity (audio) \
plural infinities

Kids Definition of infinity

1 : the quality of being without limits the infinity of space
2 : a space, quantity, or period of time that is without limit

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