lu·mi·nar·y

[loo-muh-ner-ee] noun, plural lu·mi·nar·ies, adjective
noun
1.
a celestial body, as the sun or moon.
2.
a body, object, etc., that gives light.
3.
a person who has attained eminence in his or her field or is an inspiration to others: one of the luminaries in the field of medical science.
adjective
4.
of, pertaining to, or characterized by light.

Origin:
1400–50; late Middle English luminarye < Medieval Latin lūmināria lamp. See luminaria

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2013.
Cite This Source Link To luminary
00:10
Luminary is always a great word to know.
So is bezoar. Does it mean:
a calculus or concretion found in the stomach or intestines of certain animals, esp. ruminants, formerly reputed to be an effective remedy for poison.
a screen or mat covered with a dark material for shielding a camera lens from excess light or glare.
Collins
World English Dictionary
luminary (ˈluːmɪnərɪ) [Click for IPA pronunciation guide]
 
n , pl -naries
1.  a person who enlightens or influences others
2.  a famous person
3.  literary something, such as the sun or moon, that gives off light
 
adj
4.  of, involving, or characterized by light or enlightenment
 
[C15: via Old French, from Latin lūmināre lamp, from lūmen light]

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Etymonline
Word Origin & History

luminary
mid-15c., "source of (artificial) light," from M.Fr. luminarie "lamp, light," from L.L. luminare "light, torch, lamp, heavenly body," lit. "that which gives light," from L. lumen (gen. luminis) "light," related to lucere "to shine" (see light (n.)). Sense of "notable person" is first recorded 1690s.
Online Etymology Dictionary, © 2010 Douglas Harper
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Example sentences
Families of fallen firefighters will light luminary candles for each firefighter.
The significant thing about an airport is where it is, not what faded old pol
  or other local luminary it's named after.
Nobody ought to be called a luminary until they've been set on fire.
Technically, in fact, naming a street so quickly after a dead luminary violates
  city laws.
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