AS

[noun] [C] - US abbreviation for Associate in Science (= US degree) A/S level [noun] [C] - a British examination of a standard between GCSE and A level which allows more subjects to be studied than is possible at A level because less information needs to be learnt for itI'm doing (= studying) 5 A/S levels instead of 3 A levels.Are you doing A/S-level French?I've got 3 A/S levels.