1. Physical or mental weariness resulting from exertion. 2. the fatigue of a long hike. 3. The decreased capacity or complete inability of an organism, an organ, or a part to function normally because of excessive stimulation or prolonged exertion. 4. The weakening or failure of a material, such as metal or wood, resulting from prolonged stress. 5. Manual or menial labor, such as barracks cleaning, assigned to soldiers. 6. Clothing worn by military personnel for labor or for field duty. 7. To tire with physical or mental exertion; weary. 8. To create fatigue in (a metal or other material). 9. 1
