No, there is no universal definition.
I think part of that comes from the fact that, in reference to my earlier remarks, indigenous peoples are not a homogeneous group. There is high diversity among indigenous peoples and the different kinds of knowledge systems they hold. We see this with other knowledge holders, such as scientists. Different types of scientists have different types of knowledge. Different cultures around the world have different knowledge systems. Similarly, there's a high diversity of indigenous knowledge systems.
This is why my recommendation to the committee is that it specifically recognize, in the context of the study, the fact that this diversity is difficult to reflect in a brief study, and talk about the need for indigenous peoples to have self-determination to describe their own knowledge systems.