noun
General term for a seat in a vehicle, theater, or similar setting. Also used in compounds like シートベルト (seat belt).
飛行機のシートをリクライニングした。
I reclined the airplane seat.
このバスには50のシートがある。
This bus has 50 seats.
座席 is a more formal or written term for a seat, while シート is a common loanword used in everyday contexts, especially for vehicle and theater seats.
Loanword from English 'seat'.