lu·​nar | \ ˈlü-nər also -ˌnär How to pronounce lunar (audio) \

Definition of lunar

1 : crescent, lunate who grasps the struggling heifer's lunar horns— Alexander Pope
2a : 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

Examples of lunar in a Sentence

Recent Examples on the Web The following year, Apollo 11 Lunar Module Pilot Buzz Aldrin took communion, including wine, on the lunar surface. Fox News, "Beer in orbit: Why space is the next frontier for alcohol," 7 Dec. 2019 While some have a niche, like 19th century lunar photography, others are less discriminating. Wired, "Want Vintage NASA Space Photos? Sotheby's Can Help," 3 Dec. 2019 Brussels engineer Michael van Langren began the custom of applying personal names to lunar formations in 1645, starting with the names of kings and other distinguished people. Kristen Rogers, CNN, "The US proposed nuking the moon, and other surprising facts about Earth's celestial satellite," 22 Nov. 2019 The technology could be used for lunar rovers, surface equipment and habitats. Stephen Singer,, "As NASA plans a return to trip to the moon, these 2 Connecticut companies will help astronauts get there," 18 Nov. 2019 After Heidmann’s death in 2000, Maccone took up the cause of preserving the lunar farside for radio astronomy. Wired, "Alien Hunters Need the Far Side of the Moon to Stay Quiet," 15 Nov. 2019 The country's burgeoning space program achieved a lunar milestone this year by landing a spacecraft on the mysterious far side of the moon. Washington Post, "World Digest: Nov. 14, 2019," 14 Nov. 2019 There is also a lunar eclipse, where Earth passes directly between the sun and the moon, casting a reddish shadow on the lunar surface., "On Monday, you can witness Mercury in motion as the tiny planet waltzes across the face of the sun. This celestial dance, known as the transit of Mercury, last occurred in 2016 and will not happen again until 2032. North American skywatchers will have to wait until 2049 for an encore.," 11 Nov. 2019 This is also a good time to search for lunar rays with telescopes. Arnold Pearlstein,, "The Stars This Week: Nov. 10-16," 10 Nov. 2019

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.

See More

First Known Use of lunar

15th century, in the meaning defined at sense 1

History and Etymology for lunar

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

Keep scrolling for more

Learn More about lunar

Time Traveler for lunar

Time Traveler

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

See more words from the same century

Statistics for lunar

Last Updated

10 Dec 2019

Cite this Entry

“Lunar.” The Dictionary, Merriam-Webster Inc., Accessed 15 December 2019.

Keep scrolling for more

More Definitions for lunar


How to pronounce lunar (audio)

English Language Learners Definition of lunar

: of or relating to the moon


lu·​nar | \ ˈlü-nər How to pronounce lunar (audio) \

Kids Definition of lunar

1 : of or relating to the moon lunar rock
2 : measured by the revolutions of the moon a lunar month


lu·​nar | \ ˈlü-nər also -ˌnär \

Medical Definition of lunar

Keep scrolling for more

More from Merriam-Webster on lunar

Rhyming Dictionary: Words that rhyme with lunar

Spanish Central: Translation of lunar

Nglish: Translation of lunar for Spanish Speakers

Britannica English: Translation of lunar for Arabic Speakers

Comments on lunar

What made you want to look up lunar? Please tell us where you read or heard it (including the quote, if possible).


delight or enjoyment

Get Word of the Day daily email!

Test Your Vocabulary

Great Scrabble Words—A Quiz

  • scrabble tiles that read scrabble quiz
  • Which of the following Q-without-U words means the number five in cards or dice?
Spell It

Can you spell these 10 commonly misspelled words?

Syn City

Test Your Knowledge - and learn some interesting things along the way.

Love words? Need even more definitions?

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