lu·nar | \ˈlü-nər also -ˌnär \

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 naval architect built a tiny vacation home that looks just like a lunar lander. Liz Stinson, Curbed, "This tiny home was modeled after a lunar lander," 21 June 2018 Based in Pennsylvania, Astrotobic is developing a suite of robots to take payloads to the lunar surface, as well as rovers that can cross the Moon’s landscape. Loren Grush, The Verge, "The Arch Foundation’s first step toward building a Lunar Library," 15 May 2018 Foster + Partners first unveiled designs for a lunar habitat module in 2012, in partnership with the European Space Agency. NBC News, "Here's what future Mars and lunar space colonies could look like," 7 July 2018 Otherwise with Federatsiya stalled, Russian cosmonauts would depend on NASA to carry its crews to the near-lunar gateway and beyond. Anatoly Zak, Popular Mechanics, "Russia's Soyuz Spacecraft Could Find New Life as a Lunar Taxi," 6 July 2018 The lunar calendar determines the dates Unlike most holidays, Passover and Easter aren’t anchored to specific dates. Scott Craven, azcentral, "Why Easter and Passover are observed on different dates each year," 28 Mar. 2018 Likewise, July's solar eclipse kicks off a new lunar cycle on the Cancer-Capricorn axis that will last until January 2020. Aliza Kelly Faragher, Allure, "What July's Pisces Horoscope Means for You," 29 June 2018 The Islamic calendar is based on the lunar cycle, and the beginning of a new month is subject to moon sighting. Sabeeha Rehman, WSJ, "How America Makes Ramadan Easier," 31 May 2018 The idea of sending to humans to the lunar surface somehow feels ho-hum today; even as the US is shifting its near-term goals from Mars to the Moon again. Nathan Mattise, Ars Technica, "Trailer: 20th century’s greatest technical achievement goes Hollywood in First Man," 11 June 2018

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.

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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

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Phrases Related to lunar

lunar month

Statistics for lunar

Last Updated

15 Oct 2018

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Time Traveler for lunar

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

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More Definitions for lunar



English Language Learners Definition of lunar

: of or relating to the moon


lu·nar | \ˈlü-nər \

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 

: lunate

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