lunar

adjective

lu·​nar ˈlü-nər 

 also  -ˌnär

1

: crescent, lunate

who grasps the struggling heifer's lunar horns

—Alexander 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

Examples of lunar in a Sentence

Recent Examples on the Web

Other ways to experience the falls include the Macuco Safari, which sends you on a Jeep ride through the rainforest, followed by a speedboat ride down the river, and a Full Moon Walking Tour, a nighttime trek to see the rare lunar rainbow. —Jennifer Kester, Forbes.com, 10 Sep. 2025

This results because Earth's atmosphere absorbs relatively short wavelengths of light, letting only the longer-wavelength reddish hues through to paint the lunar surface. —Mike Wall, Space.com, 9 Sep. 2025

What phase of the lunar cycle is the moon in now? —Jenna Prestininzi, Freep.com, 9 Sep. 2025

The next total lunar eclipse will take place on March 2, 2026, marking the third eclipse in a series of three total lunar eclipses in a lunar year. —Valerie Mesa, PEOPLE, 8 Sep. 2025

Word History

Etymology

Middle English lunare, borrowed from Latin lūnāris "of the moon, crescent-shaped," from lūna "moon" + -āris -ar; lūna going back to Indo-European *lou̯k-s-neh₂, derivative of the verb stem *leu̯k- "become bright," whence also Old Church Slavic luna "moon," Russian luná, Old Prussian lauxnos "stars," Armenian lusin "moon"; from a stem *lou̯k-s-no- Old Irish lúan in día lúain "Monday," Avestan raoxšna- "light," (with presumed zero-grade) Greek lýkhnos "lamp" — more at light entry 1

First Known Use

15th century, in the meaning defined at sense 1

Phrases Containing lunar

• lunar caustic
• lunar eclipse
• lunar module
• lunar month

Rhymes for lunar

• schooner
• sooner
• spooner
• tuner
• lacunar
• semilunar

Kids Definition

lunar

adjective

lu·​nar ˈlü-nər 

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