- XA stands for Extended Architecture
- XA stands for Activated Factor X
- XA stands for Extended Attribute
- XA stands for Extensible Architecture
- XA stands for Exchange Access
- XA stands for Chi Alpha Campus Ministries, USA (Assemblies of God secular college & university student outreach)
- XA stands for Exclusion Area (military)
- XA stands for Exiled Alliance (gaming)
- XA stands for Harley-Davidson World War II shaft drive military motorcycle model
- XA stands for XRay Angio
- XA stands for Expanded Architecture
- XA stands for Secretariat/Executive Agents
XA