moon

noun
\ ˈmün How to pronounce moon (audio) \

Definition of moon

 (Entry 1 of 2)

1a often capitalized : the earth's natural satellite (see satellite sense 2a) that shines by the sun's reflected light, revolves about the earth from west to east in about 29¹/₂ days with reference to the sun or about 27¹/₃ days with reference to the stars, and has a diameter of 2160 miles (3475 kilometers), a mean distance from the earth of about 238,900 miles (384,400 kilometers), and a mass about one eightieth that of the earth usually used with the
b : one complete moon cycle consisting of four phases (see phase entry 1 sense 1)
c : satellite sense 2 specifically : a natural satellite of a planet the moons of Jupiter
2 : an indefinite usually extended period of time a labor of many moons
3 : moonlight keep out of the moon or it may turn your head— H. R. Haggard
4 : something that resembles a moon: such as
a : a highly translucent (see translucent sense 1) spot on old porcelain
b : lunule
c slang : naked buttocks
5 : something impossible or inaccessible reach for the moon
over the moon
: very pleased : in high spirits

moon

verb
mooned; mooning; moons

Definition of moon (Entry 2 of 2)

transitive verb

1 : to spend in idle reverie : dream used with away mooned the afternoon away
2 slang : to expose one's naked buttocks to One of the boys mooned the crowd.

intransitive verb

: to spend time in idle reverie : behave abstractedly fans mooning over movie stars

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Other Words from moon

Noun

moonlike \ ˈmün-​ˌlīk How to pronounce moonlike (audio) \ adjective

Synonyms for moon

Synonyms: Noun

aeon (or eon), age, blue moon, coon's age, cycle, donkey's years [chiefly British], eternity, forever, long, months

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Examples of moon in a Sentence

Noun

The telescope makes the craters on the surface of the moon incredibly clear. the orbit of the Moon around the Earth Europa and Io are both moons of Jupiter. a planet orbited by one moon

Verb

One of the boys mooned the crowd. One of the boys mooned at the crowd.
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Recent Examples on the Web: Noun

To look back on my exchange with Stevens is a reminder of how firmly conspiracy thinking has taken hold in America, from anti-vaxxer propaganda to the belief that the moon landing was faked. James Shapiro, The New Yorker, "An Unexpected Letter from John Paul Stevens, Shakespeare Skeptic," 6 Aug. 2019 A few weeks ago, the 50th anniversary of the first moon landing was celebrated in a unique way: Images of Apollo 11 were projected onto the Washington Monument. John Kelly, Washington Post, "In 1969, Gonzaga students tweaked their rivals with the mother of all pranks," 5 Aug. 2019 Kennedy estimated early on that the first moon landing would cost about $7 billion to $9 billion. Cnn.com Wire Service, The Mercury News, "How NASA’s Apollo program kicked off Silicon Valley’s tech revolution," 5 Aug. 2019 Kennedy estimated early on that the first moon landing would cost about $7 billion to $9 billion. Jackie Wattles, CNN, "How NASA's Apollo program kicked off Silicon Valley's tech revolution," 4 Aug. 2019 The agency injected animals and insects with lunar material, as well as grew plants in lunar soil to test for contamination after the Apollo 11 mission NASA had a unique way of testing lunar materials following the 1969 moon landing. Matt Mcnulty, PEOPLE.com, "NASA Fed Moon Dust to Cockroaches to Test for Contamination after the 1969 Lunar Landing," 30 July 2019 The flavor commemorates the 50th anniversary of the moon landing and is only available at the fair and Velvet Ice Cream's Ye Olde Mill in Utica. Jackie Borchardt, Cincinnati.com, "Pickle juice popsicles and Skyline Chili tater tots are a thing at the Ohio State Fair," 25 July 2019 Director Ken Bell and the band will celebrate the anniversary of the moon landing with traditional concert band fare. San Diego Union-Tribune, "North County School News, July 25," 25 July 2019 News of the settlement broke this Tuesday, just days after the 50th anniversary of Armstrong's moon landing was celebrated on Saturday. Fox News, "Neil Armstrong's family received $6 million in malpractice settlement 2 years after astronaut's death: report," 24 July 2019

Recent Examples on the Web: Verb

Someone apparently isn’t mooning over the huge, 10-by-30-foot mural that shows the bare buttocks of the Garden of Eden couple. USA TODAY, "Smokey Bear, tarantula trek, censoring Adam and Eve: News from around our 50 states," 9 Aug. 2019 Ultimately, one of the main goals of the program is to offset the cost of running the ISS—about $3 billion to $4 billion per year—as NASA shifts its spending from the aging station to moon and Mars missions. Stefanie Waldek, Condé Nast Traveler, "You Can Soon Vacation in Space for $35,000 Per Night," 10 June 2019 Then later, upon being released on bail, the man bizarrely dropped his pants and mooned photographers outside the court building. Fox News, "Man late for Ryanair flight arrested for chasing down plane on Dublin Airport tarmac," 28 Sep. 2018 The whole reason for mooning a group text in the first place. Madeline Buxton, refinery29.com, "Dear Apple, You Forgot Some Very Important "Do Not Disturb" Settings," 6 June 2018 She and Tom Arnold had mooned the crowd at a World Series game to show off their matching tattoos. Kate Stanhope, latimes.com, "Rocky road: Roseanne Barr's rollercoaster Hollywood ride," 10 Apr. 2018 These days any rocketeer wishing to get staggeringly pie-eyed and maybe moon the Moon will have to hitch a ride with another space agency altogether. David Arky, Smithsonian, "How Do You Make Beer in Space?," 20 Mar. 2018 Who can forget Ilie Nastase pulling down his pants and mooning the chair umpire Charles Hare in Palm Springs in 1976? Cindy Shmerler, New York Times, "Tennis Moves Toward Taking the Human Element Out of Line Calls," 1 Mar. 2018 The old Birmingham guard repaid the favor by using the worlds' largest cast iron statue to perpetually moon the little town that preferred seeking its own stars. Birmingham Magazine, AL.com, "A History of Homewood," 19 Feb. 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'moon.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of moon

Noun

before the 12th century, in the meaning defined at sense 1a

Verb

1836, in the meaning defined at transitive sense 1

History and Etymology for moon

Noun and Verb

Middle English mone, from Old English mōna; akin to Old High German māno moon, Latin mensis month, Greek mēn month, mēnē moon

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Dictionary Entries near moon

mooley

moolings

moolvee

moon

moon's man

moon after

moonal

Statistics for moon

Last Updated

13 Aug 2019

Look-up Popularity

Time Traveler for moon

The first known use of moon was before the 12th century

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More Definitions for moon

moon

noun

English Language Learners Definition of moon

 (Entry 1 of 2)

: the large round object that circles the Earth and that shines at night by reflecting light from the sun
: a large round object like the moon that circles around a planet other than the Earth

moon

verb

English Language Learners Definition of moon (Entry 2 of 2)

informal : to bend over and show your bare buttocks to someone as a rude joke or insult

moon

noun
\ ˈmün How to pronounce moon (audio) \

Kids Definition of moon

 (Entry 1 of 2)

1 : the natural heavenly body that shines by reflecting light from the sun and revolves about the earth in about 29¹/₂ days

moon

verb
mooned; mooning

Kids Definition of moon (Entry 2 of 2)

moon

noun
\ ˈmün How to pronounce moon (audio) \

Medical Definition of moon

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More from Merriam-Webster on moon

Thesaurus: All synonyms and antonyms for moon

Spanish Central: Translation of moon

Nglish: Translation of moon for Spanish Speakers

Britannica English: Translation of moon for Arabic Speakers

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