いっとう【一等】 the first class[grade].〜の first-class[-rate].〜で旅行する travel first-class.‖一等航海(機関)士 the chief mate (first engineer).一等車(切符，乗[船]客) a first-class carriage (ticket,passenger).一等賞a[the]first prize.一等星 a star of the first magnitude.