Determine, as a ref, is a term used to describe the act of making a decision or ruling on something. It is often used in the context of sports, where referees are responsible for making decisions on the field. The term can also be used in other contexts, such as in the legal system, where judges are responsible for making rulings on cases. In all contexts, the term determine, as a ref, is used to describe the act of making a decision or ruling.