An activity that contributes to the purpose or outcomes of a process or enhances the capability of a process. [ ISO/IEC 15504 ]
Practice [ ISO/IEC/IEEE 24765 ]: Requirements employed to prescribe a disciplined uniform approach to the software development process.
Practice [ IEEE 1490 ]: A specific type of professional or management activity that contributes to the execution of a process and that may employ one or more techniques and tools.