Pauline Hanson believes there's no definition of what an Aboriginal person is - and the issue is about equality.

"If you marry an Aboriginal you can be classified (as one), or if the community or the elders accept you into that community you can be defined as an Aboriginal," the One Nation leader told Andrew Bolt on Sky News on Monday.

"That's not good enough because then if you make a comment about it, well what are you? Are you an Aboriginal or non-Aboriginal?"

Senator Hanson made the remarks while defending calls for changes to the Racial Discrimination Act.

The firebrand senator says she had previously raised issues about "equality" over the years about the definition of 'Aboriginal'.

"I think the whole lot needs to be opened up on this, a big debate on this."

She believes people have become increasingly precious but it should be up to the public to judge controversial comments, including from her or indigenous leader Noel Pearson.

Mr Pearson has denied allegations he racially abused a Queensland minister seven years ago.