the natural satellite of the earth, visible (chiefly at night) by reflected light from the sun

there was no moon, but a sky sparkling with brilliant stars

the first man on the moon

behave or move in a listless and aimless manner

I don't want her mooning about in the morning

expose one's buttocks to someone in order to insult or amuse them

the crew dropped their trousers and mooned at them

Dan had whipped round, bent over, and mooned the crowd