Main Entry: lu·mi·nism

Pronunciation: \ˈlü-mə-ˌni-zəm\

Function: noun

Usage: often capitalized

Date: circa 1974

: a theory or practice of realist landscape and seascape painting developed in the United States in the mid-19th century and concerned with the study and depiction of effects of light and atmosphere

— lu·mi·nist \-nist\ noun or adjective often capitalized