noun
a condition caused by overexposure to the sun's rays, characterized by faintness, dizziness, and nausea
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The hiker was hospitalized after suffering from severe sunstroke during his trek.
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I got a terrible sunstroke after spending the whole day at the beach without sunscreen.
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Dude, I'm totally fried from that sunstroke I got at the music festival.
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The intense heat of the debate left him feeling like he had a mental sunstroke.