A school of late 19th century French painters who pictured appearances by strokes of unmixed colors to give the impression of reflected light WordNet 3.0 & Open English WordNet

Impressionism was a 19th-century art movement characterized by relatively small, thin, yet visible brush strokes, open composition, emphasis on accurate depiction of light in its changing qualities, ordinary subject matter, unusual visual angles, and inclusion of movement as a crucial element of human perception and experience. Wikipedia

Art movement. Wikipedia Disambiguation

19th-century art movement Wikidata

A movement in art characterized by visible brush strokes, ordinary subject matters, and an emphasis on light and its changing qualities. OmegaWiki

Movement in art. Wiktionary (translation)