lunar
Americanadjective
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of or relating to the moon.
the lunar orbit.
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measured by the moon's revolutions.
a lunar month.
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resembling the moon; round or crescent-shaped.
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of or relating to silver.
noun
adjective
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of or relating to the moon
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occurring on, used on, or designed to land on the surface of the moon
lunar module
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relating to, caused by, or measured by the position or orbital motion of the moon
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of or containing silver
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Relating to the Moon.
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Measured by the revolution of the Moon around the Earth.
Other Word Forms
Etymology
Origin of lunar
First recorded in 1585–95, lunar is from the Latin word lūnāris of the moon. See Luna, -ar 1
Explanation
The adjective lunar is used to describe something that is related to the moon. If you like astronomy, you probably enjoy lunar eclipses, when the Earth casts its shadow on the moon. Lunar comes from the Latin word luna, meaning moon. The Roman goddess of the moon is called Luna (Selene in Greek mythology). There are lunar eclipses, a lunar calendar, lunar tides, and lunar orbits. Maybe you want to be the first live-in chef on a lunar space station. You can also hear lunar in the word lunatic — they used to think insanity was related to the cycles of the moon.
Vocabulary lists containing lunar
Over The Moon: Planetary Vocabulary
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Eclipse Vocabulary
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February Vocabulary Words
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Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
People around the globe are encouraged to spend time observing our nearest celestial neighbor while learning about lunar science, exploration, and the Moon's influence on cultures throughout history.
From Science Daily ● Sep. 3, 2026
The United States is competing with China in the race to land astronauts on the Moon before 2030, more than 50 years after humans first walked the lunar surface.
From Barron's ● Aug. 28, 2026
A partial lunar eclipse will take place in the early hours of Friday, when the Moon enters Earth's darkest shadow.
From BBC ● Aug. 27, 2026
Angelenos are exactly where they need to be to see Thursday’s partial “blood moon” lunar eclipse — provided the weather cooperates.
From Los Angeles Times ● Aug. 26, 2026
The Egyptian calendar had 12 months, like the lunar one, but each month was 30 days long.
From "Zero: The Biography of a Dangerous Idea" by Charles Seife
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
