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English definition of “crunch”

crunch

noun [C usually plural] (EXERCISE)    /krʌntʃ/
an exercise in which you lie on your back on the floor with your knees bent and your feet flat on the floor, and then raise your head and shoulders: Doing crunches every day strengthens your abdominal muscles.
(Definition of crunch noun (EXERCISE) from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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