Definition of "as"
as1
/æz/
- conjunction- (dated) Introducing a comparison with a hypothetical state (+ subjunctive, or with the verb elided): as though, as if. 
- (rare, now England, Midland US and Southern US, possibly obsolete) Than. 
 
as2
/ˈæs/
as3
- noun- (rare) Alternative form of a's.