noun the cause of weariness; labor; toil; as, the fatigues of war.
2. fatigue ·noun the weakening of a metal when subjected to repeated vibrations or strains.
3. fatigue ·noun weariness from bodily labor or mental exertion; lassitude or exhaustion of strength.
4. fatigue ·noun to weary with labor or any bodily or mental exertion; to harass with toil; to exhaust the strength or endurance of; to tire.