moon
US /muːn/
UK /muːn/

1.
the natural satellite of the earth, visible by reflected sunlight, and having a disk-like appearance at full moon
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The moon was full and bright in the night sky.
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Astronauts have walked on the moon.
2.
a natural satellite of any planet
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Jupiter has many moons.
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Scientists are studying the moons of Saturn.
1.
2.
to behave in a listless, dreamy, or languid manner, especially because of being in love
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She's been mooning over him ever since they met.
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Stop mooning around and get some work done!