Origin: Greek suffix -ism
Abstractionism has 3 different meanings across 1 category:
an abstract genre of art; artistic content depends on internal form rather than pictorial representation
a representation having no reference to concrete objects or specific examples
The creation, principles, or ideals of abstractions, in particular art.
Abstractionism comes from the word abstraction combined with the suffix -ism. It originally meant the practice or theory of creating art based on abstract forms rather than realistic representations.