lunar

adjective

lu·​nar ˈlü-nər How to pronounce lunar (audio)
 also  -ˌnär
1
: crescent, lunate
who grasps the struggling heifer's lunar hornsAlexander Pope
2
a
: of, relating to, or resembling the moon
lunar craters
a lunar landscape
b
: designed for use on the moon
lunar vehicles
3
: measured by the moon's revolution
lunar month

Example Sentences

Recent Examples on the Web The moon takes about 30 days to revolve around the Earth, which is called a lunar cycle. Joel Shannon, USA TODAY, 3 Mar. 2023 Unlike Earth dust, lunar dust clings and is hard to brush off surfaces. Lee Roop | Lroop@al.com, al, 3 Mar. 2023 But there are technical issues that scientists have to consider when developing a lunar time system, like the fact that clocks run faster on the moon by about 56 microseconds each day. Caitlin Mcfall, Fox News, 1 Mar. 2023 Experts are unsure whether one space agency should set and maintain the lunar time. Devika Rao, The Week, 28 Feb. 2023 Nonetheless, that’s the most popular designation for March’s full lunar phase, which reaches its peak illumination around 7:42 a.m. EDT on the evening of March 7. Michael D'estries, Treehugger, 28 Feb. 2023 Billy Crudup stars as a complicated guy who sells lunar timeshares and who won’t take no for an answer. Matthew Gilbert, BostonGlobe.com, 28 Feb. 2023 Still, experts haven’t yet ironed out exactly how the lunar time would work. Margaret Osborne, Smithsonian Magazine, 28 Feb. 2023 European Space Agency There are also debates about how to even figure out lunar timekeeping. Denise Chow, NBC News, 27 Feb. 2023 See More

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'lunar.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

Word History

Etymology

Middle English, from Latin lunaris, from luna moon; akin to Latin lucēre to shine — more at light

First Known Use

15th century, in the meaning defined at sense 1

Time Traveler
The first known use of lunar was in the 15th century

Dictionary Entries Near lunar

Cite this Entry

“Lunar.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/lunar. Accessed 8 Mar. 2023.

Kids Definition

lunar

adjective
lu·​nar ˈlü-nər How to pronounce lunar (audio)
1
: of, relating to, or resembling the moon
lunar craters
a lunar landscape
2
: measured by the moon's revolution
lunar month

Medical Definition

lunar

adjective
lu·​nar
ˈlü-nər also -ˌnär
: lunate

More from Merriam-Webster on lunar

Last Updated: - Updated example sentences
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!


Which Came First?

  • baby chick with a brown egg
  • hot take or cold shoulder?
True or False

Test your knowledge - and maybe learn something along the way.

TAKE THE QUIZ
Solve today's spelling word game by finding as many words as you can with using just 7 letters. Longer words score more points.

Can you make 12 words with 7 letters?

PLAY