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Definition of fatigue
1extreme tiredness, typically resulting from mental or physical exertion or illness:he was nearly dead with fatigue a reduction in the efficiency of a muscle or organ after prolonged activity. weakness in materials, especially metal, caused by repeated variations of stress:metal fatigue [with modifier] a lessening in one’s response to or enthusiasm for something, typically as a result of overexposure to it:museum fatigue 2 (also fatigue detail) a group of soldiers ordered to perform menial, nonmilitary tasks, sometimes as a punishment.
) loose-fitting clothing, typically khaki, olive drab, or camouflaged, worn by soldiers:battle fatigues
verb (fatigues, fatiguing, fatigued) [with object] (often be fatigued)
cause (someone) to feel tired or exhausted:they were fatigued by their journey reduce the efficiency of (a muscle or organ) by prolonged activity. weaken (a material, especially metal) by repeated variations of stress.
- adjective (also fatigable)