invariance

noun

in·​vari·​ance (ˌ)in-ˈver-ē-ən(t)s How to pronounce invariance (audio)
: the quality or state of being invariant

Examples of invariance in a Sentence

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Bootstrappers take such interactions for granted by assuming Lorentz invariance (the symmetries of a flat space-time fabric for particles to move around in). Quanta Magazine, 23 Mar. 2026 Modern sensors, particularly those with ISO invariance, where underexposing at base ISO and pushing shadows in post matches high-ISO in-camera results with lower noise, have revolutionized exposure flexibility for deep-sky imaging. James Abbott, Space.com, 25 Feb. 2026 But how would that spectrum of seed fluctuations differ from perfect scale-invariance? Big Think, 22 Oct. 2025 Scale invariance occurs in trees because trunks, limbs and twigs all branch in similar ways and for similar reasons. Mitchell Newberry, The Conversation, 11 Feb. 2025 The lower-dimensional theory also had an additional symmetry—conformal invariance—where the physical laws don’t change for all transformations of spacetime that preserve angles. Anil Ananthaswamy, Scientific American, 1 Mar. 2023 With this in mind, the authors set out to prove scale invariance first, believing that rotational invariance would be the most difficult symmetry and knowing that translational invariance was simple enough and wouldn’t require its own proof. Allison Whitten, Wired, 11 July 2021 One source of this robustness is the topological invariance mentioned earlier. IEEE Spectrum, 21 June 2011

Word History

First Known Use

1878, in the meaning defined above

Time Traveler
The first known use of invariance was in 1878

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Cite this Entry

“Invariance.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/invariance. Accessed 3 Jul. 2026.

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