First Known Use: before 12th century
Dictionary
1moon
noun \ˈmün\
the moon : 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
Full Definition of MOON
1
a often capitalized : the earth's natural satellite 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 c : satellite 2; specifically : a natural satellite of a planet
2
: an indefinite usually extended period of time <a labor of many moons>
3
4
: something that resembles a moon: as a : a highly translucent spot on old porcelain b : lunule c slang : naked buttocks
5
: something impossible or inaccessible <reach for the moon>
— moon·like \-ˌlīk\ adjective
— over the moon
: very pleased : in high spirits
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Origin of MOON
Middle English mone, from Old English mōna; akin to Old High German māno moon, Latin mensis month, Greek mēn month, mēnē moon
Related to MOON
2moon
verb
: to bend over and show your bare buttocks to someone as a rude joke or insult
Full Definition of MOON
transitive verb
1
: to spend in idle reverie : dream —used with away
2
slang : to expose one's naked buttocks to
intransitive verb
: to spend time in idle reverie : behave abstractedly
See moon defined for English-language learners
First Known Use of MOON
1836
MOON Defined for Kids
1moon
noun \ˈmün\
Definition of MOON for Kids
1
: the natural heavenly body that shines by reflecting light from the sun and revolves about the earth in about 291⁄2 days
2
: satellite 1
2moon
verb
moonedmoon·ing
Definition of MOON for Kids
Medical Dictionary
moon
noun \ˈmün\
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