A movement in the arts in which the artist did not depict objective reality, but rather a subjective expression of their inner experiences / A somewhat analogous genre in early 20th century music

plural of expressionism

Of or pertaining to expression, either in language, genetics, the face or the arts

By means of expression

An American genre of modern art that used improvised techniques, such as sinuous linearity, to generate highly abstract forms while allowing the artist spontaneity.

(less common) Alternative form of Abstract Expressionism