From Longman Dictionary of Contemporary EnglishO gradeO grade /ˈəʊ ɡreɪd $ ˈoʊ-/ noun [countable, uncountable] SESan examination in a particular subject which children take in schools in Scotland, usually at the age of 16 → higher → O level
Examples from the Corpus
O grade• The table shows whether the respondent had tried to obtain an O grade pass or not. 