MEANINGFUL AND UNIQUE, BUT NOT BEAUTIFUL.
In his book Whole New Mind (WNM) Dan Pink says (and I'm paraphrasing) that Right-Brain is "meaningful, unique and beautiful". I like this premise, and he elaborates upon it throughout WNM. To me this is the most pure definition of visual art, whether it's 2- or 3-dimensional, and of music, dance, theatre, authorship, calligraphy, flower-arrangement, singing, public speaking, performances, even stand-up comedy. (I heard it said - as a side-bar - that Jerry Seinfeld says "if you work CLEAN, you can work ANYWHERE," and that to me is where "beauty" comes in, added to "unique" and "funny"!)
But back to Right-Brain as a definition. D. Pink, in WNM, says that "intellectual" is not considered Right-Brain, but Left-Brain. And there's obviously a place for "intellectual". However in art, for example in DaDa-ism, which for many is extremely MEANINGFUL, and of course UNIQUE, (that's a given!), I feel they were clearly rebelling against BEAUTY.
To me, it's a question of DESIGN.