[ loo-ner ]
/ ˈlu nər /


of or relating to the moon: the lunar orbit.
measured by the moon's revolutions: a lunar month.
resembling the moon; round or crescent-shaped.
of or relating to silver.


a lunar observation taken for purposes of navigation or mapping.

Origin of lunar

First recorded in 1585–95, lunar is from the Latin word lūnāris of the moon. See Luna, -ar1

Related forms

un·lu·nar, adjective Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for lunar

British Dictionary definitions for lunar


/ (ˈluːnə) /


of or relating to the moon
occurring on, used on, or designed to land on the surface of the moonlunar module
relating to, caused by, or measured by the position or orbital motion of the moon
of or containing silver

Word Origin for lunar

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

Medicine definitions for lunar


[ lōōnər ]


Relating to the moon or to a month.
Containing silver.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

Science definitions for lunar


[ lōōnər ]

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