Definition of disoriented
: having lost one's sense of time, place, or identity
She opened her eyes, startled and disoriented for an instant. The little cell she slept in was dismally black.— Sidney Sheldon Since fleeing to London, the 40-year-old businessman has had nightmares, chest pains and is so disoriented that he can barely look after his kids.— Tony Horwitz He remembered nothing for more than a few seconds. He was continually disoriented.— Oliver Sacks
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Merriam-Webster unabridged
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The first known use of disoriented was in 1900
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