An older word for a female flight attendant (cabin crew). The gender-neutral term 客室乗務員 is now commonly used.
昔はスチュワーデスと呼ばれていた職業だが、今は客室乗務員と言うことが多い。
It used to be called 'stewardess', but now it's more often referred to as 'cabin crew' or 'flight attendant'.
彼女は子どもの頃、スチュワーデスになりたいと思っていた。
She wanted to become a stewardess when she was a child.