"the use of skill and imagination in the creation of aesthetic objects, environments, or experiences that can be shared with others" (Britannica Online)

Leo Tolstoy on "What is Art?"

In order correctly to define art, it is necessary, first of all, to cease to consider it as a means to pleasure and to consider it as one of the conditions of human life. Viewing it in this way we cannot fail to observe that art is one of the means of intercourse between man and man.

Every work of art causes the receiver to enter into a certain kind of relationship both with him who produced, or is producing, the art, and with all those who, simultaneously, previously, or subsequently, receive the same artistic impression.

The activity of art is based on the fact that a man, receiving through his sense of hearing or sight another man's expression of feeling, is capable of experiencing the emotion which moved the man who expressed it. To take the simplest example; one man laughs, and another who hears becomes merry; or a man weeps, and another who hears feels sorrow. A man is excited or irritated, and another man seeing him comes to a similar state of mind. By his movements or by the sounds of his voice, a man expresses courage and determination or sadness and calmness, and this state of mind passes on to others. A man suffers, expressing his sufferings by groans and spasms, and this suffering transmits itself to other people; a man expresses his feeling of admiration, devotion, fear, respect, or love to certain objects, persons, or phenomena, and others are infected by the same feelings of admiration, devotion, fear, respect, or love to the same objects, persons, and phenomena.

And it is upon this capacity of man to receive another man's expression of feeling and experience those feelings himself, that the activity of art is based.

We are accustomed to understand art to be only what we hear and see in theaters, concerts, and exhibitions, together with buildings, statues, poems, novels. . . . But all this is but the smallest part of the art by which we communicate with each other in life. All human life is filled with works of art of every kind - from cradlesong, jest, mimicry, the ornamentation of houses, dress, and utensils, up to church services, buildings, monuments, and triumphal processions. It is all artistic activity. So that by art, in the limited sense of the word, we do not mean all human activity transmitting feelings, but only that part which we for some reason select from it and to which we attach special importance.

There is one indubitable indication distinguishing real art from its counterfeit, namely, the infectiousness of art. If a man, without exercising effort and without altering his standpoint on reading, hearing, or seeing another man's work, experiences a mental condition which unites him with that man and with other people who also partake of that work of art, then the object evoking that condition is a work of art. And however poetical, realistic, effectful, or interesting a work may be, it is not a work of art if it does not evoke that feeling (quite distinct from all other feelings) of joy and of spiritual union with another (the author) and with others (those who are also infected by it).

If a man is infected by the author's condition of soul, if he feels this emotion and this union with others, then the object which has effected this is art; but if there be no such infection, if there be not this union with the author and with others who are moved by the same work - then it is not art. And not only is infection a sure sign of art, but the degree of infectiousness is also the sole measure of excellence in art.

LEO TOLSTOY On Art