<p><strong>Noun</strong></p><ul><li>The moon or the Moon, the earth's natural satellite, orbiting the earth at a mean distance of 238,857 miles (384,393 km) and having a diameter of 2,160 miles (3,476 km).</li><li>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 entity.</li><li>Compare full moon (def 1), half-moon (def 1), new moon (def 1), waning moon (def), waxing moon (def).</li><li>A lunar month, or, in general, a month.</li><li>Any planetary satellite: the moons of Jupiter.</li><li>Something shaped like an orb or a crescent.</li><li>Moonlight (def 1).</li><li>A platyfish.</li><li>Slang: the buttocks, especially when bared.</li></ul><p><strong>Verb</strong></p><ul><li>(used without object) To act or wander abstractedly or listlessly: You've been mooning about all day.</li><li>To sentimentalize or remember nostalgically: He spent the day mooning about his lost love.</li><li>To gaze dreamily or sentimentally at something or someone: They sat there mooning into each other's eyes.</li><li>Slang: to expose one's buttocks suddenly and publicly as a prank or gesture of disrespect.</li><li>(used with object) To spend (time) idly: She mooned the afternoon away, unable to think what to do next.</li><li>To illuminate by or align against the moon.</li><li>Slang: to expose one's buttocks to as a prank or gesture of disrespect.</li></ul>