Definition of A-side in English:
The side of a pop single regarded as the main one.
- The double A-side single Young Man is currently out on promo.
- I wanted to make an album that didn't have any throw away tracks on it… where every piece is a potential A-side single.
- I also like the idea of recording songs in pairs and putting them out as double A-sides.
Definition of A-side in:
- US English dictionary