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

Unfortunately for lunar enthusiasts in Africa and Europe, the spectacle will not be visible there. —Claire Cameron, Scientific American, 2 Mar. 2026

Also flying is the Lunar Trailblazer, a mission selected under NASA’s Small Innovative Missions for Planetary Exploration (SIMPLEx) program, a small satellite designed to provide an understanding of the form, abundance, and distribution of water on the moon, as well as the lunar water cycle. —Richard Tribou, The Orlando Sentinel, 2 Mar. 2026

Higher-magnification binoculars such as 12x50 or 15x70 — the latter regarded as specialist astronomy binoculars — will bring the lunar surface closer still. —Jamie Carter, Space.com, 2 Mar. 2026

Ultimately, the modular approach is designed to secure the lunar high ground and support a sustainable, long-term space economy. —Mrigakshi Dixit, Interesting Engineering, 2 Mar. 2026

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