You're missing my point about the abstractness of the word.
Words in general are abstract of course. It's a tree because we say it's a tree. But a tree can be pointed out... it's concrete. Human is human, cat is cat, paper is paper. These are concrete nouns.
Verbs, adjectives and the sort can hold a concreteness to them as they usually describe a specific thing about a concrete object. Run is an object moving its legs and moving swiftly.
But we get these words that are used to describe abstract things with no direct or even indirect attachment to concrete objects or even concrete concepts.
Happy is abstract as it describes an abstract emotion which is not tangible, but it is concrete as it stand distinctly different from sad or angry. There can be different kinds of happiness, but there can be different kinds of trees... that's just category and nothing to do with abstract vs concrete.
But words like beauty, art, love... these are subjectively abstract. Not only are they abstract in definition, they describe abstract models. Love is a word describing an abstract feeling. There is NO concrete model to attach this word to.
Art is the same way. Yes there are concrete objects that are called art, but the concept of art is completely subjective. A canvas is not art, paint is not art, paint on a canvas is not art... art is when someone calls it art. It's when we abstractly decide it is art.
And there is a definition to it, but that very definition is unholy abstract and just supports my point of how abstract the word is. No one group has ever been able to specifically and directly define it.
Look at http://www.dictionary.com's definition of art:
art
1 /ɑrt/ Show Spelled Pronunciation [ahrt] Show IPA
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–noun
1. the quality, production, expression, or realm, according to aesthetic principles, of what is beautiful, appealing, or of more than ordinary significance.
2. the class of objects subject to aesthetic criteria; works of art collectively, as paintings, sculptures, or drawings: a museum of art; an art collection.
3. a field, genre, or category of art: Dance is an art.
4. the fine arts collectively, often excluding architecture: art and architecture.
5. any field using the skills or techniques of art: advertising art; industrial art.
6. (in printed matter) illustrative or decorative material: Is there any art with the copy for this story?
7. the principles or methods governing any craft or branch of learning: the art of baking; the art of selling.
8. the craft or trade using these principles or methods.
9. skill in conducting any human activity: a master at the art of conversation.
10. a branch of learning or university study, esp. one of the fine arts or the humanities, as music, philosophy, or literature.
11. arts,
a. (used with a singular verb) the humanities: a college of arts and sciences.
b. (used with a plural verb) liberal arts.
12. skilled workmanship, execution, or agency, as distinguished from nature.
13. trickery; cunning: glib and devious art.
14. studied action; artificiality in behavior.
15. an artifice or artful device: the innumerable arts and wiles of politics.
16. Archaic. science, learning, or scholarship.
and even then that isn't all the known definitions... and they reach 16 distinct versions of it. With no real common ground accept the common theme of it being a descriptor for inventions of man.
Compare this to the subjectively abstract word love:
love
/lʌv/ Show Spelled Pronunciation [luhv] Show IPA noun, verb, loved, lov⋅ing.
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–noun
1. a profoundly tender, passionate affection for another person.
2. a feeling of warm personal attachment or deep affection, as for a parent, child, or friend.
3. sexual passion or desire.
4. a person toward whom love is felt; beloved person; sweetheart.
5. (used in direct address as a term of endearment, affection, or the like): Would you like to see a movie, love?
6. a love affair; an intensely amorous incident; amour.
7. sexual intercourse; copulation.
8. (initial capital letter) a personification of sexual affection, as Eros or Cupid.
9. affectionate concern for the well-being of others: the love of one's neighbor.
10. strong predilection, enthusiasm, or liking for anything: her love of books.
11. the object or thing so liked: The theater was her great love.
12. the benevolent affection of God for His creatures, or the reverent affection due from them to God.
13. Chiefly Tennis. a score of zero; nothing.
14. a word formerly used in communications to represent the letter L.
–verb (used with object)
15. to have love or affection for: All her pupils love her.
16. to have a profoundly tender, passionate affection for (another person).
17. to have a strong liking for; take great pleasure in: to love music.
18. to need or require; benefit greatly from: Plants love sunlight.
19. to embrace and kiss (someone), as a lover.
20. to have sexual intercourse with.
–verb (used without object)
21. to have love or affection for another person; be in love.
—Verb phrase
22. love up, to hug and cuddle: She loves him up every chance she gets.
—Idioms
23. for love,
a. out of affection or liking; for pleasure.
b. without compensation; gratuitously: He took care of the poor for love.
24. for the love of, in consideration of; for the sake of: For the love of mercy, stop that noise.
25. in love, infused with or feeling deep affection or passion: a youth always in love.
26. in love with, feeling deep affection or passion for (a person, idea, occupation, etc.); enamored of: in love with the girl next door; in love with one's work.
27. make love,
a. to embrace and kiss as lovers.
b. to engage in sexual activity.
28. no love lost, dislike; animosity: There was no love lost between the two brothers.
then compare this to the specific and concrete word (and related to both beauty, love and art in that it is a form of all 3):
paint⋅ing
/ˈpeɪntɪŋ/ Show Spelled Pronunciation [peyn-ting] Show IPA
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–noun
1. a picture or design executed in paints.
2. the act, art, or work of a person who paints.
3. the works of art painted in a particular manner, place, or period: a book on Flemish painting.
4. an instance of covering a surface with paint.
concrete models can be described simply and easily.
Abstract subjective models can not... because they're just that, subjective. They were inventions of man to describe certain things in certain cultures... and over time the similarities mold together and evolve with time. And each culture, group, or social belief will strip certain models from their own personal concept of art, love, or beauty... but in the end it does not remove any validity from my decision to call literature art, or a perverts to call the exotice dancer art.
Even a single instance of art is art, it doesn't have to be recorded or recreated to be art. Take Jazz as someone once brought up, Jazz is an artform, a musician improvisin his piece that night will never be recreated accurately ever again. The common string each night is that it is Jazz, Jazz being the artform. And thusly that unique piece the musician played one night and will never play again is art in and of itself. It was the artist expression and message however vague or not it is.
In the end art, beauty and love do not stand concretely apart from anything else. Happy stands apart from sad and angry in the concrete model of emotion. (not concrete object, but concrete model)
but what does art stand apart from? Non-art? Beauty stands apart from non-beauty? And Love from non-Love? And yes I bet someone will quickly throw in that Love is apart from hate, and beauty from ugly.
But ugly is just as abstract as beauty... and is just as subjective in corrolation. That and hate is not apart from love... truly on the most primal of urges, one usually can not love unless they hate. What is that phrase?
"Hate is not the opposite of love, it is apathy."
Best example of which is the loathing hatred my parents had for each other was only a result of their unbridaled passion towards each other. It was the mere fact they loved each other so much that they could hate with such aggression.