high school(redirected from High-school diploma)
Also found in: Dictionary, Thesaurus.
1. Brit another term for grammar school
2. US and NZ a secondary school from grade 7 to grade 12
3. Canadian a secondary school, the grades covered depending on the province
high school, secondary school
In the US, a school which provides education beyond elementary school, usually from grade 9 to grade 12 but occasionally including grades 7 and 8.