What's in a name???I like this very all-encompassing definition - abstraction indicates a departure from reality in depiction of imagery in art. Abstraction exists along a continuum; abstract art can formally refer to compositions that are derived (or abstracted) from a figurative or other natural source. It also can refer to non-representational art and non-objective art that has no derivation from figures or objects.
To add clarity to the concept of "non-objective", here is a very clear and colourful example from Kadinsky:
Yellow Red and Blue 1925 |
Circus 7 |