Expressionism is an Art movement in which artists seek to primarily depict subjective emotions and responses that elicit objectivity or events rather than spontaneous objective reality directly. However, what can be said is that it was a movement that developed in the early twentieth century, as part of the Modern Art movement, mainly in Germany, in reaction to the dehumanizing effect of industrialization and the growth of cities.
Expressionism has been likened to Baroque by critics. Still, the difference between the two is that "Expressionism doesn't shun the violently unpleasant effect, while Baroque does. Expressionism throws some terrific expletives, Baroque doesn't. Baroque is well-mannered."