secondary school

secondary school (countable and uncountable, plural secondary schools)

1. (education, British, Ireland) In the UK and Ireland, a state school attended between the ages of 11 and 16 or 18.
   • 2019 October, James Abbott, “Esk Valley revival”, in Modern Railways, page 77:

     One of the key roles played by the Whitby line is the transport of children from rural spots along the branch to secondary school in the coastal town.

2. (education, Canada, US) The federally designated, graduation-separated classification of grades 9–12 (approximately ages 14–18), regardless of whether they are compiled together in one school or separate from the other grades.
3. (education, Hong Kong) School with education level between primary school and university.
4. (education, Singapore) Middle school; junior high school; a school that one attends between the ages of 12-17 (equivalent of grades 7-10 in North America, and years 7-10 in Australia).

• high school (equivalent in the US)