The property, quality or state of being "that which pleases merely by being perceived" (Aquinas); that which is attractive, pleasing, fine or good looking; comeliness.
Someone who is beautiful.
Chris is a beauty.
Something that is particularly good or pleasing.
That phrasing is a beauty.
What a goal, what a beauty.
An excellent or egregious example of something.
(with the definite article) The excellence, e.g. the genius
The Beauty of the deal is it costs nothing!
(physics, obsolete) A Beauty quark (now called bottom quark).