"colonialism" refers to extracting whatever idea or artifact is seen as valuable from a culture or a land without consent and/or without respecting the moral rights of who invented or made it.
Additionally, you can read the wikipedia page.
(edited for clarity: different people use majority/minority differently depending on the context. In this context it's not about raw numbers.)
(edit: an example of power dynamic could be a large multinational food chain that takes a lesser-known dish from some culture and sells a butchered version worldwide without clearly indicating the origin and/or that it's not the real thing. By doing this it can easily distorts the idea of the dish in the minds of millions of people.)