infinity

American  

[in-fin-i-tee] / ɪnˈfɪn ɪ ti /

noun

plural

infinities

1. the quality or state of being infinite.

2. something that is infinite.

3. infinite space, time, or quantity.

4. an infinite extent, amount, or number.

5. an indefinitely great amount or number.

6. Mathematics.

   1. the assumed limit of a sequence, series, etc., that increases without bound.

   2. infinite distance or an infinitely distant part of space.

7. Photography.

   1. a distance between a subject and the camera so great that rays of light reflected from the subject may be regarded as parallel.

   2. a distance setting of the camera lens beyond which everything is in focus.

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infinity British  

/ ɪnˈfɪnɪtɪ /

noun

1. the state or quality of being infinite

2. endless time, space, or quantity

3. an infinitely or indefinitely great number or amount

4. optics photog a point that is far enough away from a lens, mirror, etc, for the light emitted by it to fall in parallel rays on the surface of the lens, etc

5. physics a dimension or quantity of sufficient size to be unaffected by finite variations

6. maths the concept of a value greater than any finite numerical value

7. a distant ideal point at which two parallel lines are assumed to meet

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infinity Scientific  

/ ĭn-fĭn′ĭ-tē /

1. A space, extent of time, or quantity that has no limit.

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Usage

What is the infinity symbol? The infinity symbol, a figure eight on its side ∞, variously signifies the concept of limitlessness or eternity, especially as used notationally in mathematics and metaphorically with respect to love.

Etymology

Origin of infinity

First recorded in 1350–1400; Middle English infinite, from Latin infīnitās, from in- in- ³ + fīni(s) “boundary, end, highest point” ( finish ) + -tās -ty ²

Example Sentences

Yonatan Albalak, her son, posted on Facebook April 2 that his mother had been “gathered into infinity after a short and hard battle with the cursed disease” of cancer.

From Los Angeles Times • Apr. 3, 2026

"You all knew Chuck Norris as the man that counted to infinity twice, the man who got bit by a cobra and the cobra died," she says.

From BBC • Mar. 20, 2026

“Expansive terraces, meditation gardens, and hidden courtyards evoke a world-class resort ambiance, while infinity pools and a private boathouse complete its coastal allure,” the description noted.

From MarketWatch • Jan. 14, 2026

The modern home in Hollywood Hills, complete with an infinity pool overlooking the city, rented for $33,000 for seven nights from June 15 to 22.

From Los Angeles Times • Dec. 21, 2025

A parabola is simply an ellipse with one focus at infinity.

From "Zero: The Biography of a Dangerous Idea" by Charles Seife