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

The first crewed lunar mission since Apollo 17 in 1972 is now scheduled for April 2026. —Joshua Rhett Miller, MSNBC Newsweek, 2 Apr. 2025

The result of billions of years of micrometeorite impacts on the lunar surface and lack of water on the Moon has left this dust with jagged, razor-sharp shapes and the constant bombardment by cosmic rays has given each particle an electrostatic charge. —David Szondy, New Atlas, 1 Apr. 2025

Each year, Ramadan and both Eid holidays fall about 11 days earlier than the year before because of the lunar cycle. —Julia Gomez, USA Today, 28 Mar. 2025

Apollo, though god of the sun, was selected to represent the lunar voyages because of his great power in the sky. —Smithsonian Magazine, Smithsonian Magazine, 28 Mar. 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