Which in turns links to this explanation:
https://humanrights.gov.au/sites/def...atisracism.pdf
As you can see the concept can be continually expanded upon and no doubt you could find a variety of statements about racism in any number of places. It's a potential study, gathering the statements on racism from the human rights commissions of various states and jurisdictions, compare the differences, similarities, etc.
Racism is about power dynamics, those who feel they're losing power have reason to try and find definitions that resist this loss. Which is why the intention behind a definition is central to that definition.