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seat collapse: any support where you can sit (especially the part of a chair or bench etc. on which you sit); "he dusted off the seat before sitting down"; furniture that is designed for sitting on; "there were not enough seats for all the guests"; the cloth covering for the buttocks; "the seat of his pants was worn through"; a space reserved for sitting (as in a theater or on a train or airplane); "he booked their seats in advance"; "he sat in someone else's place"; a center of authority (as a city from which authority is exercised); show to a seat; assign a seat for; "The host seated me next to Mrs. Smith"; provide with seats; "seat a concert hall"; put a seat on a chair; be able to seat; "The theater seats 2,000"

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