illumination

il·lu·mi·na·tion

noun \il-ˌü-mə-ˈnā-shən\

Definition of ILLUMINATION

1

: the action of supplying or brightening with light or the resulting state

2

: the luminous flux per unit area on an intercepting surface at any given point—called also illuminance

—il·lu·mi·nate \il-ˈü-mə-ˌnāt\ transitive verb, il·lu·mi·nat·ed il·lu·mi·nat·ing