"to light up, illuminate," 1620s (obsolete), from *luminatus, past participle of Late Latin luminare "to shine," from Latin lumen (genitive luminis) "light," from suffixed form of PIE root *leuk- "light, brightness." Illuminate now does the job. An older verb was lumine (late 14c.); a newer one is luminize (1958). Related: Luminated; luminating; lumination; luminator.
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