This sense is either from the original meaning of hand, or from the use of the hand, or rather of the right hand. In this sense the word is still used. We say of a well fought combat and victory, it is a handsome affair, an affair well performed, done with dexterity or skill. [See Handy.]
The applications of this word in popular language are various and somewhat indefinite. In general, when applied to things, it imports that the form is agreeable to the eye, or to just taste; and when applied to manner, it conveys the idea of suitableness or propriety with grace.
HAND'SOME, as a verb, to render neat or beautiful, is not an authorized word.