high school

a school attended after elementary school or junior high school and usually consisting of grades 9 or 10 through 12.

Origin of high school

First recorded in 1815–25

high-school, adjective high schooler, noun

I was in a long-distance relationship at the time with my high-school boyfriend.

How I Stopped My Rapist |Natasha Alexenko |November 24, 2014 |DAILY BEAST
Two new films about high-school football peddle the same old toxic myths of masculinity.

Two New Films Preach Our Nation’s Corrosive Gridiron Gospel |Steve Almond |September 20, 2014 |DAILY BEAST
In a little over a month, the high-school junior had turned $5,000 into over $90,000.

He Bullies Kids and Calls It News |Brandy Zadrozny |June 26, 2014 |DAILY BEAST
But when I asked her to OK an interview with her mother present (she was still in high-school) I never heard from her again.

He Bullies Kids and Calls It News |Brandy Zadrozny |June 26, 2014 |DAILY BEAST

I was the only person in high-school history to be lapped in a mile race on a quarter-mile track.

The Ridiculousness of Father's Day |P. J. O’Rourke |June 15, 2014 |DAILY BEAST
Burkin, the high-school teacher, stayed every summer at Count P——-'s, and had been thoroughly at home in this district for years.

The Wife and Other Stories |Anton Chekhov
It was supposed (by the interested members of the high-school class) that Ramsey and Milla were "engaged."

Ramsey Milholland |Booth Tarkington
Morris Brown University is not a university at all, but does grammar and high-school work.

American Adventures |Julian Street
Perhaps in the societies of the high-school girls that part is left out.

A Young Girl's Diary |An Anonymous Young Girl
The clapper of the high-school bell was swinging wilder and harder against the metal sides than ever before in its short life.

The Boy Scouts of Lakeville High |Leslie W. Quirk

high school

British another term for grammar school

US and NZ a secondary school from grade 7 to grade 12

Canadian a secondary school, the grades covered depending on the province