head girl noun
The senior girl in a school
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Main Entry: ↑head
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a senior girl in a school who is the leader of the students and who represents the school on official occasions
Thesaurus: school pupilshyponym
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noun, pl ⋯ girls [count]
Brit : an older female student in a British school who is chosen to have special duties and to represent the school
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(in some British schools) the girl who is chosen each year to represent her school
Useful english dictionary. 2012.