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grade thirteen

A Canadian historical term for the optional or compulsory 13th year of secondary school, which existed in Ontario until 2003.

ˈɡɹeɪd ˈθɝˈtinDocumented since 2000s2000sGen Z164 viewsLast reviewed Jun 29, 2026+ Add a definition
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Born ~2003 · no dated citations yet
2003BornToday, 2026
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#1·Apr 28, 2026

A Canadian historical term for the optional or compulsory 13th year of secondary school, which existed in Ontario until 2003. It served as a university preparatory year and was used for university entrance. Its elimination was controversial and it remains a cultural reference point for generations of Ontarians.

He stayed for grade thirteen to boost his average before applying to engineering.
Origin: Canadian educational term; refers to the former Ontario secondary school year (also called OAC: Ontario Academic Credit); abolished in 2003. Editorial expansion authored on Slangora.
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#2·Apr 27, 2026

(Canada, historical) Thirteenth grade.

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