noun
moonbeam
MOON-beem
noun
1
A ray or beam of light from the moon.
"A single moonbeam fell across the sleeping child's bed."
2
(informal) A person who is dreamy, impractical, or given to unrealistic ideas.
"He's a bit of a moonbeam — full of grand plans that never happen."
How to Use Moonbeam
Learner’s notesIn plain EnglishA ray of moonlight, or informally, someone who is dreamy and unrealistic.
Common pairings
a moonbeam falls
silvery moonbeam
Word Forms
moonbeams plural
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Etymology
A compound of moon and beam.