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

If SpaceX can get a lunar-lander variant of Starship ready on time, NASA could use it to send humans to the surface of the moon for the first time in more than 50 years as soon as 2028. — Adam Kovac, Scientific American, 25 July 2026

In a lunar coincidence, Friday's launch coincided with the 57th anniversary of the Apollo 11 astronauts' return to Earth after their historic moon landing flight. — Tariq Malik, Space.com, 25 July 2026

The vehicle is expected to become the primary launcher for future generations of Starlink satellites while also supporting NASA’s Artemis lunar program and, eventually, SpaceX’s long-term ambitions for Mars exploration. — Kaif Shaikh, Interesting Engineering, 25 July 2026

Inside the 400,000-year-old extinct volcanic cinder cone, which is about 40 miles northeast of Flagstaff, are artwork and a naked-eye observatory with tunnels and chambers aligned with solar, lunar and stellar events. — Rebecca 'becca' Dyer, AZCentral.com, 23 July 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