high school

high school
ˈhigh school noun
1. [uncountable and countable] a school in the US and Canada for children of 14 or 15 to 18 years old ⇨ junior high school
    in high school
    We were friends in high school.
    high school students
    high school graduates
2. [singular] used in the names of some schools in Britain for children from 11 to 18 years old:
    Leytonstone High School for Girls
⇨ secondary school