muːn mun ˈdeɪdɹiːm muːn mun muːn mun expose one's buttocks to moon the audience be idle in a listless or dreamy way have dreamlike musings or fantasies while awake She looked out the window, daydreaming any natural satellite of a planet Jupiter has sixteen moons the natural satellite of the Earth the average distance to the Moon is 384,400 kilometers men first stepped on the moon in 1969 any object resembling a moon he made a moon lamp that he used as a night light the clock had a moon that showed various phases the period between successive new moons (29.531 days)