Definition of "AS"
AS1
proper noun
noun
(education, UK, historical) Initialism of Advanced Supplementary.
(education, UK) Initialism of Advanced Subsidiary.
(cardiology) Initialism of aortic stenosis.
(neurology) Initialism of Asperger's syndrome.
(medicine) Initialism of ankylosing spondylitis.
(Internet) Initialism of autonomous system.
(Java programming language) Initialism of application server.
AS2
phrase
(Islam) Initialism of alayhi as-salaam.