verb
to lay oneself flat on the ground face downward, especially in reverence or submission
adjective
lying stretched out on the ground with one's face downward
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The patient was found prostrate on the floor, unable to move.
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He was lying prostrate on the couch, too tired to get up.
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I felt so prostrate after that long hike, I could barely walk.
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The defeat in the final game left the team prostrate with disappointment.