verb (used with object), verb (used without object), illumined, illumining.

1300–50; Middle English illuminen < Latin illūmināre to light up, equivalent to il- il-1 + lūmin- (stem of lūmen) light + -ā- thematic vowel + -re infinitive suffix

illuminable, adjective
self-illumined, adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
Cite This Source Link To illumine
World English Dictionary
illumine (ɪˈluːmɪn)
a literary word for illuminate
[C14: from Latin illūmināre to make light; see illuminate]

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Example sentences
Skylights cover the roof and illumine every room, including baths.
Thous ands of tuns of flax straw illumine our nights with its burning.
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