two-seater
US /ˈtuːˌsiːtər/
UK /ˈtuːˌsiːtər/

1.
a vehicle, especially a car or aircraft, with seats for only two people
:
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He arrived in a sleek red two-seater sports car.
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The small aircraft was a two-seater, perfect for short flights.
1.
having seats for only two people
:
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The new model features a sleek, two-seater design.
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They rented a small, two-seater convertible for their road trip.