01 n. The act of exerting, or putting into motion or action; the active exercise of any power or faculty; an effort, esp. a laborious or percepti…
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The act of exerting, or putting into motion or action; the active exercise of any power or faculty; an effort, esp. a laborious or perceptible effort; as, an exertion of strength or power; an exertion of the limbs or of the mind; it is an exertion for him to move, to-day.