Definition of overtired
: excessively tired (as from overexertion or lack of sleep)
feeling overtired The following morning, Mrs. Inglethorp stayed in bed to breakfast, as she was rather overtired.— Agatha Christie It isn't only our children who become overtired, overstressed, and out of control at times. We do, too.— Joyce Maynard
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Merriam-Webster unabridged
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Time Traveler for overtired
The first known use of overtired was in 1567
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