im ‧ pres ‧ sion ‧ is ‧ m BrE AmE , Impressionism /ɪmˈpreʃ ə nɪz ə m/ noun [uncountable]
[ Word Family: noun : ↑ impression , ↑ impressionism , ↑ impressionist , ↑ impressiveness ; adjective : ↑ impressionable , ↑ impressive ≠ ↑ unimpressive , ↑ impressionistic , ↑ unimpressed ; adverb : ↑ impressively , ↑ impressionistically ; verb : ↑ impress ]
1 . a style of painting used especially in France in the 19th century that uses colour instead of details of form to produce effects of light or feeling ⇨ realism
2 . a style of music from the late 19th and early 20th centuries that produces feelings and images by the quality of sounds rather than by a pattern of notes