年龄较大，还没结婚，也没有男朋友，但是往往有高学历，或者高收入的女性群体

A women who hasn't married yet bu is old enough.

没男人要女人。又称剩下女人，简称剩女

剩女means the girl who haven't any boyfriends. Usually ,she is not young for marriage.Nowdays ,many elder girls who are well educated and earn more are the rest(剩下的).Perhaps they are too busy with their work or studies.In Chinese opions, man always want to marry a girl who is more younger than him ,so it is quite hard for the 剩女 to find a man matching her.