A request was made for a second thread, to cover the definition.
My personal opinion:
Beauty: Something or someone that I can look at that gives me pleasure by looking alone. Alternately, a concept or other intangible that's damn near perfect.
Attractiveness: As Garbo said, "fuckability". I'm not visually-geared, so in THIS case, beauty is a combination of pheremones and what's in the person's head.
Thank you for that. Reading through the quibbling in the other thread I kept thinking over and over why nobody had stipulated "visually". Sensually, smell plays a much bigger part than look in what I find attractive. I was beginning to think I was the only one.
Weird part is, the few things that really grab me visually, I could describe in perfect detail right down to my physiological response to them. Which smells attract or repel me, I couldn't even begin to generalize about even though when they hit me, they hit me like a fucking bar-stool. Probably has to do with being taught how to say, spell and identify colors in pre-K, and still not even being entirely sure if I could tell you what "acrid" means.
That also probably explains a lot about why I immediately wanted to jump on the OP in the other thread and start quibbling myself. My concept of visual beauty is so minute that I very, very rarely even think of it when I'm using the word beauty. My use of that word occurs much more in that alternate je ne sais quois sense, even when I'm explicitly using it to refer to sensual beauty.
This leaves kind of a tricky question, if the predominant understanding of "beauty" is visual physical attractiveness conforming to some objectively agreed upon standard, when I say "beautiful" in the sense I experience it, am I shooting off bad-signal without meaning to?