illuminate

[v. ih-loo-muh-neyt; adj., n. ih-loo-muh-nit, -neyt]
verb (used with object), illuminated, illuminating.
1.
to supply or brighten with light; light up.
2.
to make lucid or clear; throw light on (a subject).
3.
to decorate with lights, as in celebration.
4.
to enlighten, as with knowledge.
5.
to make resplendent or illustrious: A smile illuminated her face.
6.
to decorate (a manuscript, book, etc.) with colors and gold or silver, as was often done in the Middle Ages.
verb (used without object), illuminated, illuminating.
7.
to display lights, as in celebration.
8.
to become illuminated.
adjective
9.
Archaic. illuminated.
10.
Obsolete, enlightened.
noun
11.
Archaic. a person who is or affects to be specially enlightened.

Origin:
1400–50; late Middle English < Latin illūminātus (past participle of illūmināre to light up, brighten). See illumine, -ate1

illuminatingly, adverb
preilluminate, verb (used with object)
reilluminate, verb, reilluminated, reilluminating.
semi-illuminated, adjective
unilluminated, adjective


2. clarify, explain, elucidate.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
illuminate
 
vb
1.  (tr) to throw light in or into; light up: to illuminate a room
2.  (tr) to make easily understood; clarify
3.  to adorn, decorate, or be decorated with lights
4.  (tr) to decorate (a letter, page, etc) by the application of colours, gold, or silver
5.  (intr) to become lighted up
 
adj
6.  archaic made clear or bright with light; illuminated
 
n
7.  a person who has or claims to have special enlightenment
 
[C16: from Latin illūmināre to light up, from lūmen light]
 
il'luminative
 
adj
 
il'luminator
 
n

Collins English Dictionary - Complete & Unabridged 10th Edition
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Example sentences
The arbor includes built-in light fixtures that illuminate the dining area and
  the fireplace.
Zoo staff monitored the egg each day, by weighing it and using a bright light
  to illuminate the egg's interior.
Ninety percent of the energy used to illuminate a regular bulb is spent on heat
  rather than light.
The staircase is in complete darkness and night-light candles were used to
  illuminate the scene.
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