noun
a person, especially an older or married woman, who accompanies and supervises a young unmarried woman on social occasions
verb
to accompany and supervise a young unmarried woman on social occasions
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The school requires each field trip to have at least one adult chaperon.
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Do you think your mom can chaperon our movie night?
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I can't believe my dad is chaperoning the school dance, he's so embarrassing!
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The CEO acted as a chaperon during the merger negotiations, making sure both parties stayed on track.