Simple past tense and past participle of seat.(verb)
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Use "seated" in a sentence
"So deep-seated is this obsession that we in the Anglosphere move seamlessly from discussing rising home prices and house flipping to conjecturing about the opportunities that waves of foreclosures will bring."
"Please remain seated, the mothership is closing in on your location and will soon pick you up for minor adjustments."
"As in seated at the back of the gathering, from my reading."