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The Collaborative International Dictionary of English v.0.48 (gcide)

Illuminate \Il*lu"mi*nate\, v. t. [imp. & p. p. {Illuminated};
p. pr. & vb. n. {Illuminating}.] [L. illuminatus, p. p. of
illuminare; pref. il- in luminare to enlighten, fr. lumen
light. See {Luminous}, and cf. {Illume}, {Illumine},
{Enlimn}, {Limn}.]
1. To make light; to throw light on; to supply with light,
literally or figuratively; to brighten.
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2. To light up; to decorate with artificial lights, as a
building or city, in token of rejoicing or respect.
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3. To adorn, as a book or page with borders, initial letters,
or miniature pictures in colors and gold, as was done in
manuscripts of the Middle Ages.
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4. To make plain or clear; to dispel the obscurity to by
knowledge or reason; to explain; to elucidate; as, to
illuminate a text, a problem, or a duty.
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Illuminating \Il*lu"mi*na`ting\, a.
Giving or producing light; used for illumination.
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{Illuminating gas}. See {Gas}, n., 2
(a) .
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