- moon
- [[t]mun[/t]]n.1) astron. the earth's natural satellite, orbiting the earth at a mean distance of 238,857 miles (384,393 km) and having a diameter of 2160 miles (3476 km)2) astron. this body during a particular lunar month, or during a certain period of time, or at a certain point of time, regarded as a distinct object or entity3) a lunar month, or, in general, a month4) astron. any planetary satellite:the moons of Jupiter[/ex]5) something shaped like an orb or a crescent6) moonlight7) to act or wander abstractedly, listlessly, or dreamily:to moon about all day[/ex]8) to sentimentalize or remember nostalgically9) cvb sts Slang. to expose one's buttocks suddenly and publicly as a prank or gesture of disrespect10) to spend (time) idly:to moon the afternoon away[/ex]•Etymology: bef. 900; ME mone, OE mōna; c. OFrismōna, OOHG māno, ON māni, Go mena; akin to L mēnsis month, Gk mḗnē moon, mēn month, Skt māsa moon, month moon′er, n. moon′less, adj.
From formal English to slang. 2014.