/ fəˈtiːg; NAmE / noun
1.
[ U ] a feeling of being extremely tired, usually because of hard work or exercise
SYN exhaustion , tiredness :
physical and mental fatigue
Driver fatigue was to blame for the accident.
I was dropping with fatigue and could not keep my eyes open.
2.
[ U ] (usually after another noun) a feeling of not wanting to do a particular activity any longer because you have done too much of it :
battle fatigue
3.
[ U ] weakness in metal or wood caused by repeated bending or stretching :
The wing of the plane showed signs of metal fatigue .
4.
fatigues [ pl. ] loose clothes worn by soldiers
5.
fatigues [ pl. ] ( especially NAmE ) duties, such as cleaning and cooking, that soldiers have to do, especially as a punishment
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WORD ORIGIN
mid 17th cent. (in the sense task that causes weariness ): from French fatigue (noun), fatiguer (verb), from Latin fatigare tire out, from ad fatim , affatim to satiety or surfeit.