• WordNet 3.6
    • v overfatigue tire excessively
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Webster's Revised Unabridged Dictionary
    • n Overfatigue Excessive fatigue.
    • v. t Overfatigue To fatigue to excess; to tire out.
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Century Dictionary and Cyclopedia
    • n overfatigue Excessive fatigue carried beyond the normal recuperative power of the individual.
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In literature:

It might mean a temporary breakdown from overfatigue or a sickening for deadly illness.
"The Shuttle" by Frances Hodgson Burnett
Adieu, monseigneur; do not overfatigue yourself; keep yourself fresh for the arrival of the king.
"The Man in the Iron Mask" by Alexandre Dumas, Pere
Langford was not overfatigued when she arrived at Uncle Geoffrey's house at Westminster.
"Henrietta's Wish" by Charlotte M. Yonge
Adieu, monseigneur: do not overfatigue yourself; keep yourself fresh for the arrival of the king.
"The Vicomte de Bragelonne" by Alexandre Dumas
In general, overstrain of any kind tends to overfatigue.
"How to Live" by Irving Fisher and Eugene Fisk
This depends in large degree on general health and nutrition, with freedom from overfatigue.
"The Mind and Its Education" by George Herbert Betts
The ideal distribution of pauses is extremely different from merely stopping the work when a state of overfatigue has been reached.
"Psychology and Social Sanity" by Hugo Münsterberg
Was it weakness or overfatigue that caused your fainting fit?
"Avarice-Anger:" by Eugène Sue
It was thought it was a faint brought on by overfatigue.
"The Fourth Estate, vol. 2" by Armando Palacio Valdés
How should she recognise the signs of overfatigue?
"The Tree of Knowledge" by Mrs. Baillie Reynolds