Well hello there, little kiddo! Have you ever heard of the word 'gentlewoman'? No? That's okay! It's just a fancy way of saying a woman who is polite, kind, and well-mannered.
Imagine a little girl who always says "please" and "thank you", who lets her friends go first, and who helps her parents with chores. She's a polite, kind, and well-mannered girl, right? Now, think of a grown-up woman who behaves the same way -- she's a gentlewoman!
Being a gentlewoman means showing respect and kindness to others. Sometimes, we call men who act this way 'gentlemen', so it's the same thing but just for women.
So next time you meet a woman who is polite, kind, and well-mannered, you can say she is a gentlewoman!