For questions describing a process, method or a way of doing things in general. An ordered set of steps to be implemented as procedure to follow or in software, governing how an organization solves a particular task, either by an individual contributor, a team or across multiple teams.
Process can refer to any of the three ways described here. But context of DevOps it is meant as a component of Organizational Architecture or Design. Usually we use it in the sense of Business Process in one of the following Process Areas for Development or Services. It is a unit of Organizational Learning.