Not used everyday, Carol.
In some special ways, notice the "strong" from these definitions.
Urban Dictionary puts it in a more elaborate form.A woman with the kind of refined beauty and attractiveness that requires poise, dignity, and strength of mind and character, things that often come with age; not merely sex-appeal. Usually applied to a woman who is also very well-groomed and from an upper class background.
This phrase is very dated and rarely used in today's English. Those who don't understand the term could almost be insulted by the word "handsome" being applied to a woman, mistakenly thinking you're saying she is masculine.
Obviously, I would find it "surprising" in some ways, and would rush to some dictionary or companion guide, where I would learn that it can be used, but in that sense. And it was what I did.