A polite way to refer to someone else's daughter.
先生のお嬢様が今度学校の行事に参加します。
The teacher's daughter will join the school event next time.
あの家のお嬢様は礼儀正しいと評判だ。
The daughter of that family is reputed to be well-mannered.
結婚式で新婦のお嬢様に花束を渡した。
At the wedding I handed a bouquet to the bride's daughter.
A young woman brought up in comfort and often naive or pampered; a 'young lady' in the sense of sheltered upbringing.
彼女はまるでお嬢様育ちで、重い荷物を持とうともしない。
She's like a sheltered young lady and won't even try to carry heavy luggage.
仕事の厳しさを知らないお嬢様扱いは職場では通用しない。
Being treated like a pampered young lady who doesn't know the hardships of work won't fly in the workplace.
あの帽子とドレスの組み合わせはちょっとお嬢様っぽいね。
That combination of hat and dress looks a bit like a pampered young lady's style.