noun Date: 1949 the lowest of three levels of standardized British examinations in a secondary school subject, 2. the level of education required to pass an O-level examination, a course leading to an O-level examination
O LEVEL
Meaning of O LEVEL in English
Merriam Webster. Explanatory English dictionary Merriam Webster. Толковый словарь английского языка Мерриам-Уэбстер. 2012