moon

1 noun

1 the moon the round object that you can see shining in the sky at night, and that moves around the Earth every 28 days: the first man on the moon

2 (singular) the shape of this object as it appears at a particular time: a crescent moon | There's no moon tonight. (=it cannot be seen)

3 (C) a round object that moves around a planet other than Earth: the moons of Saturn

4 ask for the moon also cry for the moon BrE informal to ask for something that is difficult or impossible to obtain

5 over the moon BrE informal very happy: She's over the moon about her new job.

6 throw a moon BrE shoot the moon AmE informal to show your bare buttocks to someone as a joke or a way of insulting someone

7 many moons ago poetic a long time ago: It all happened many moons ago.

—see also: full moon, half moon, new moon, once in a blue moon blue 1 (4), promise sb the moon promise 1 (3) 2 verb (I, T) informal to bend over and show your bare buttocks as a joke or a way of insulting someone moon about/around phrasal verb (I) BrE informal to spend your time lazily, moving around with no real purpose: I wish you'd stop mooning about and do something useful! moon over sb/sth phrasal verb (T) informal to spend your time thinking and dreaming about someone or something that you love: She sits mooning over his photograph for hours.