n. pl. lu·mi·nar·ies
a. An object, such as a celestial body, that gives light.
b. In astrology, one of the brightest celestial objects, such as the sun, moon, or bright planets.
2. A person who inspires others or achieves eminence in a field. See Synonyms at celebrity.
[Middle English, from Old French luminarie, from Latin lūmināre, to shine, from lūmen, lūmin-, light; see leuk- in the Appendix of Indo-European roots.]
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2018 by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Indo-European & Semitic Roots Appendices
Thousands of entries in the dictionary include etymologies that trace their origins back to reconstructed proto-languages. You can obtain more information about these forms in our online appendices:
The Indo-European appendix covers nearly half of the Indo-European roots that have left their mark on English words. A more complete treatment of Indo-European roots and the English words derived from them is available in our Dictionary of Indo-European Roots.