[loo-muh-niz-uh m]
  1. a style of landscape painting practiced by some mid-19th-century American artists, especially of the Hudson River School, that emphasized meticulously crafted realism and a technically precise rendering of atmosphere and of the effects produced by direct and reflected light.

Origin of luminism

1900–05; < Latin lūmin-, stem of lūmen light + -ism
Related formslu·min·ist, noun, adjective Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018