in·​vari·​ant (ˌ)in-ˈver-ē-ənt How to pronounce invariant (audio)
: constant, unchanging
specifically : unchanged by specified mathematical or physical operations or transformations
invariant factor
invariant noun

Examples of invariant in a Sentence

an invariant value
Recent Examples on the Web And the position of words within this vector space is largely invariant across different languages. The Physics Arxiv Blog, Discover Magazine, 30 May 2024 Here, the forward invariant set can be loosely interpreted as the region of attraction for the discrete-time dynamics. Evan Ackerman, IEEE Spectrum, 17 May 2024 Each will have a topological invariant, certain topological information associated to it. Quanta Magazine, 13 Mar. 2024 Finally, some of the genes which explain differences between populations are invariant within a population. Razib Khan, Discover Magazine, 5 Oct. 2011 But, as physicist Carlo Rovelli, author of The Order of Timepoints out, the elementary laws of nature, which include classical mechanics, electrodynamics, quantum theory, general relativity, and the standard model, are all invariant under the reversal of time. Conor Feehly, Discover Magazine, 3 Nov. 2021 One of our summer interns, Hsiao-Yu Fish Tung, is actually working on making the vision model fully invariant to camera placement using the same basic technique of randomizing the camera pose and orientation over a wide range. IEEE Spectrum, 15 Mar. 2023 Both theories were scale invariant, meaning the physics of the systems the theories described didn't change as the systems got larger or smaller. Anil Ananthaswamy, Scientific American, 1 Mar. 2023 The whole quantum formalism of a single bit, is invariant under 3 dimensional rotations. Sean Carroll, Discover Magazine, 16 Nov. 2011

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

Word History

First Known Use

1874, in the meaning defined above

Time Traveler
The first known use of invariant was in 1874

Dictionary Entries Near invariant

Cite this Entry

“Invariant.” Dictionary, Merriam-Webster, Accessed 21 Jun. 2024.

Kids Definition


in·​vari·​ant (ˈ)in-ˈver-ē-ənt How to pronounce invariant (audio)
: not changing or altering
invariant noun

More from Merriam-Webster on invariant

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