From Longman Dictionary of Contemporary EnglishA levelA lev‧el /ˈeɪ ˌlevəl/ noun [countable, uncountable] SES (Advanced level) an examination that students in England and Wales take, usually when they are 18 → A/S level, GCSE, GNVQ, O leveldo/take (your) A levels She decided to stay on at school and do her A levels.at A level I took maths, physics, and chemistry at A level.