AS level
US /ˌeɪ ˈes ˌlev.əl/
UK /ˌeɪ ˈes ˌlev.əl/

1.
a qualification in the UK taken by students aged 17 or 18, which is equivalent to half an A level
:
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She's studying for her AS levels in Maths and Physics.
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Many universities consider AS level grades for admission.