IMPRESSIONISM. In music, impressionism has been adopted as a term for compositions of a type analogous to impressionist paintings, in which the outlines are blurred and the expression of a mood or the suggestion of a scene, rather than the purely musical development and treatment of his material, has been the principal aim of the composer. Bach's Chromatic Fantasia might be regarded also as impressionistic. Later, Chopin and Schumann supplied many other instances, clearly forecasting the still more highly-developed methods of Debussy, Delius and other modern practitioners, with whose music, as exemplified in such works as L'Apres-midi d'un Faune of the one and In a Summer Garden of the other, the term has been more especially identified.