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

Hopefully it will be remembered as the giant push that took humanity one small step closer to walking on the lunar surface again.

From BBC • Apr. 2, 2026

The crew had to troubleshoot system hiccups on the Orion spacecraft before setting course for a lunar flyby.

From The Wall Street Journal • Apr. 2, 2026

But can you make money off the lunar frenzy?

From MarketWatch • Apr. 2, 2026

The Artemis program ultimately aims to land humans back on the moon, help the space agency establish a lunar base and serve as the testing grounds for future missions to Mars.

From Los Angeles Times • Apr. 1, 2026

There were many other emergencies in which the lunar module might find itself, and the command-module pilot’s job as rescuer was a very complex one.

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

Related Words

• moony