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lunar

[loo-ner]
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adjective
  1. of or relating to the moon: the lunar orbit.
  2. measured by the moon's revolutions: a lunar month.
  3. resembling the moon; round or crescent-shaped.
  4. of or relating to silver.
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noun
  1. a lunar observation taken for purposes of navigation or mapping.
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Origin of lunar

First recorded in 1585–95, lunar is from the Latin word lūnāris of the moon. See Luna, -ar1
Related formsun·lu·nar, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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British Dictionary definitions for lunar

lunar

adjective
  1. of or relating to the moon
  2. occurring on, used on, or designed to land on the surface of the moonlunar module
  3. relating to, caused by, or measured by the position or orbital motion of the moon
  4. of or containing silver
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Word Origin

C17: from Latin lūnāris, from lūna the moon
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for lunar

adj.

"crescent-shaped," early 15c.; "pertaining to the moon," 1620s, from Old French lunaire (15c.), from Latin lunaris "of the moon," from luna "moon," (with capital L- "moon goddess"); see Luna.

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Online Etymology Dictionary, © 2010 Douglas Harper

lunar in Medicine

lunar

(lōōnər)
adj.
  1. Relating to the moon or to a month.
  2. Lunate.
  3. Containing silver.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

lunar in Science

lunar

[lōōnər]
  1. Relating to the Moon.
  2. Measured by the revolution of the Moon around the Earth.
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The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.