lunar

American  

[loo-ner] / ˈlu nər /

adjective

1. of or relating to the moon.

   the lunar orbit.

2. measured by the moon's revolutions.

   a lunar month.

3. resembling the moon; round or crescent-shaped.

4. of or relating to silver.

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noun

1. a lunar observation taken for purposes of navigation or mapping.

lunar British  

/ ˈluːnə /

adjective

1. of or relating to the moon

2. occurring on, used on, or designed to land on the surface of the moon

   lunar module

3. relating to, caused by, or measured by the position or orbital motion of the moon

4. of or containing silver

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lunar Scientific  

/ lo̅o̅′nər /

1. Relating to the Moon.

2. Measured by the revolution of the Moon around the Earth.

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Other Word Forms

• unlunar adjective

Etymology

Origin of lunar

First recorded in 1585–95, lunar is from the Latin word lūnāris of the moon. See Luna, -ar ¹

Example Sentences

It became the first vehicle to reach the moon’s far side, becoming the longest-lived rover on the lunar surface.

From Salon • Apr. 9, 2026

Commander Reid Wiseman said the crew had a lot of scientific work to do and it was "probably the most critical lunar observations for our geology team".

From BBC • Apr. 9, 2026

The three-phase, $30-billion-dollar plan for lunar dominance is relatively straightforward.

From Salon • Apr. 9, 2026

During their historic lunar flyby, astronauts on NASA's Artemis II mission witnessed meteorites striking the rugged surface of the Moon, a sight that has piqued scientists' curiosity.

From Barron's • Apr. 8, 2026

We also worried about the rocket blast from Eagle, our lunar module, which might kick up a lot of dust and prevent Neil Armstrong from being able to see well enough to land.

From "Flying to the Moon: An Astronaut's Story" by Michael Collins

Related Words

• moony