il·lu·mi·nate

[v. ih-loo-muh-neyt; adj., n. ih-loo-muh-nit, -neyt] verb, il·lu·mi·nat·ed, il·lu·mi·nat·ing, adjective, noun
verb (used with object)
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)
7.
to display lights, as in celebration.
8.
to become illuminated.
00:10
Illuminate is one of our favorite verbs.
So is lollygag. Does it mean:
to spend time idly; loaf.
to introduce subtleties into or argue subtly about.
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

il·lu·mi·nat·ing·ly, adverb
pre·il·lu·mi·nate, verb (used with object)
re·il·lu·mi·nate, verb, re·il·lu·mi·nat·ed, re·il·lu·mi·nat·ing.
sem·i-il·lu·mi·nat·ed, adjective
un·il·lu·mi·nat·ed, adjective


2. clarify, explain, elucidate.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2013.
Cite This Source Link To illuminate
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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
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Example sentences
The staircase is in complete darkness and night-light candles were used to
  illuminate the scene.
The arbor includes built-in light fixtures that illuminate the dining area and
  the fireplace.
In the rest, leaking fluid caused the brake warning light on the car's
  instrument panel to illuminate.
Zoo staff monitored the egg each day, by weighing it and using a bright light
  to illuminate the egg's interior.
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