Longman Dictionary of Contemporary English - moon

~1 n 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 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 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 blue1 (4), promise sb the moon promise1 (3)) ~2 v informal to bend over and show your bare buttocks as a joke or a way of insulting someone moon about/around phr v 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 phr v informal to spend your time thinking and dreaming about someone or something that you love  (She sits mooning over his photograph for hours.)