General English

  • noun the fact of being tired


  • noun physical or mental tiredness resulting from exertion

Cars & Driving

  • noun the weakening of a material subjected to high stresses, which may crack or even break as a result


  • The weakening of a material caused by repeated or alternating loads. Fatigue may result in cracks or complete failure.


  • The weakening, deterioration, or failure of a material such as a metal, when subjected to a repeated and/or cyclical stress.
  • A reduction in the performance of a material over time. For instance, the gradual reduction in efficiency of a light-sensitive material.


  • noun very great tiredness
  • verb to tire someone out


  • noun a non-military task or duty (such as cleaning toilets, clearing up rubbish, peeling potatoes, etc.)

Origin & History of “fatigue”

In English a relatively formal term, fatigue goes back ultimately to a Latin expression roughly equivalent to the English notion of having ‘had it up to here’. It was borrowed from French fatiguer, a descendant of Latin fatigāre ‘tire’. this appears to have been related to the adverb affatim ‘sufficiently’, suggesting that underlying fatigāre was the idea of having ‘had enough’. The derivative indefatigable ‘tireless’ (16th c.) comes from Latin indēfatigābilis.