chaperone
/ˈtʃæpərɔn/Definitions
1. noun
A person, especially an adult, who accompanies and supervises a group of people, especially young people, in a social setting.
“The parent acted as a chaperone for their child at the school dance.”
2. verb
To act as or serve as a chaperone for someone or a group of people.
“She will chaperone her daughter’s class on the field trip.”