1
: of, relating to, or characterized by equality of measure
especially : relating to or being a crystallographic system characterized by three equal axes at right angles
2
: of, relating to, involving, or being muscular contraction (as in isometrics) against resistance, without significant shortening of muscle fibers, and with marked increase in muscle tone compare isotonic

Examples of isometric in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Experts say isometric exercises like these are most effective as part of a larger approach to blood pressure management. — Eleesha Lockett, Verywell Health, 29 Oct. 2026 For the first four weeks, the participants performed lower-body isometric wall squats three times a week at home. — Khloe Quill, FOXNews.com, 27 Oct. 2026 The research builds on previous evidence suggesting that isometric exercise can reduce blood pressure, with effects comparable to that of certain medications, Wiles said. — Allison Forsyth, HEALTH, 8 Oct. 2026 Adding some isometric palm presses can help bring an awareness back to your posture, activate your chest muscles, and release tension in your shoulders. — Sophia Dyer, Condé Nast Traveler, 26 Aug. 2026 See All Example Sentences for isometric

Word History

First Known Use

circa 1855, in the meaning defined at sense 1

Time Traveler
The first known use of isometric was circa 1855

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Cite this Entry

“Isometric.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/isometric. Accessed 8 Nov. 2026.

Kids Definition

isometric

adjective
: of, relating to, or being muscular contraction of the kind that takes place in doing isometrics

Medical Definition

isometric

adjective
1
: of, relating to, or characterized by equality of measure
especially : relating to or being a crystallographic system characterized by three equal axes at right angles
2
: of, relating to, involving, or being muscular contraction (as in isometrics) against resistance, without significant change of length of muscle fibers, and with marked increase in muscle tone compare isotonic sense 2
3
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