ordinary grade
noun /ˈɔːdnri ɡreɪd/
/ˈɔːrdneri ɡreɪd/
(also O grade)
[countable, uncountable]- (in Scotland in the past) an exam in a particular subject, at a lower level than Highers, usually taken at the age of 16. In 1988 it was replaced by the Standard Grade.