An active role is when someone takes an initiative, participates actively and plays a significant part in something. It means being pro-active rather than reactive, taking charge instead of waiting to be told what to do or simply going along with things passively. An individual who takes an active role in something is fully engaged, involved and committed to achieving the desired outcome. They are not just content to observe from the sidelines but actively participate in shaping events and making things happen. In essence, taking an active role means being a driver of change rather than a passive observer.