chaperone - definition and synonyms

noun [countable] 

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/ˈʃæpərəʊn/
singularchaperone
pluralchaperones

or chaperon 

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  1. 1
    in the past, an older woman who went with a young woman who was not married to a social event to make sure that she behaved well
  2. 2
    American a parent or teacher who goes to a school dance or other event to help to look after the children