- AB stands for Aaron Brooks (football player)
- AB stands for Abbot
- ab stands for Abdomen
- AB stands for Abduction
- AB stands for Aberdeen (postcode, UK)
- AB stands for Ability to Perform (Common Feature; Capability Maturity Model Integration)
- AB stands for Able Bodied Seaman
- AB stands for Able Seaman
- AB stands for Able-Bodied
- AB stands for Abonnement (philatelic catalog subscription)
- AB stands for Abort (ITU-T)
- AB stands for Abortion
- AB stands for About
- Ab stands for Absidia (fungi)
- AB stands for Abstract
- AB stands for Accelerated Budget
- AB stands for Access Burst
- AB stands for Accounts Branch
- AB stands for Achtung Baby (U2 album)
- AB