noun
1.
a. : a recognized form in which artistic expression is cast (as a sonnet or a symphony)
b. : a recognized medium of artistic expression (as writing or painting)
2. : an unconventional form or medium in which expression regarded as artistic may be cast
fireworks are an art form of the Mexican provinces
baseball is a popular American art form
3.
a. : a production that is regarded as a work of art
b. : a production outside the realm of painting and sculpture in which are discerned elements in some way comparable with those involved in artistic creation
a snuffbox valued as an art form by connoisseurs