WordReference Random House Unabridged Dictionary of American English © 2026
i′somet′ric ex′ercise,
- Sportexercise or a program of exercises to strengthen specific muscles or shape the figure by pitting one muscle or part of the body against another or against an immovable object in a strong but motionless action, as by pressing the fist of one hand against the palm of the other or against a desk.
- Sportany specific exercise of this type.
- 1965–70
'isometric exercise' also found in these entries (note: many are not synonyms or translations):