infinity

[ɪnˈfɪnɪti]

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Infinity means something that has no end or limit.

We use the word "infinity" often when talking about numbers and math. It's a big concept to understand, but basically it means that there's always more of something, even if we can't imagine how much more. For example, you might hear someone say that they love listening to music because there are an infinite number of songs out there to discover. This doesn't mean they'll ever actually listen to all the songs, just that there's no limit to the amount that exists.

As a noun or adjective, infinity often refers to numbers or quantities with no end. But as a verb, to go into infinity means to keep going without stopping or reaching an endpoint. For instance, "The runner went into infinity when she decided to run across the country."

How common is "infinity"?

Word infinity is considered rare in modern English.
It has a balanced usage among all categories: speech, fiction, newspapers and academic texts.

Definitions

noun

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

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