A daughter — a female child of one's parents; used for one's own or someone else's daughter.
私の娘は今小学校に通っています。
My daughter is currently attending elementary school.
娘を大学にやるために貯金している。
I'm saving money to send my daughter to university.
夏休みは娘と一緒に旅行に行く予定だ。
I plan to travel with my daughter during the summer holidays.
A girl (a young or unmarried woman). Can refer politely to someone else's young woman as 'musume-san'.
駅前で若い娘が友達と話していた。
A young girl was talking with her friends in front of the station.
お嬢さん／娘さんはお元気ですか、と聞いた。
I asked, 'How is your daughter/young lady?'
昔は『娘』という呼び方がよく使われた。
In the past, the term 'musume' was often used.