o level Olethreutidae • olfact · · · Info · Definitions · Characters · · o level · · Text Common · · Latin · · Scripts 7 · · Length 3 · · Syllables Definitions · · · (noun) the basic level of a subject taken in school. Synonyms: General Certificate of Secondary Education, GCSE, O level. · · Noun Definition 1 Characters · · space U+0020 e latin small letter e U+0065 l latin small letter l U+006C o latin small letter o U+006F v latin small letter v U+0076