Yes, the plain text of the international treaties that define genocide…

Cases of genocide brought before the ICJ aren’t based on Merriam-Webster, or the Cambridge Dictionary…

They use ratified international agreements, such as the CPPCG

You just described a genocide, like one of the plain text definitions of a genocide. Mass murdering a group of people to steal their land.

Doesn’t matter that you’ve made up a hypothetical fantasy scenario where they aren’t caged in cornered, but have free movement, it’s still a genocide.

Oh, and they aren’t free to leave, they are caged and cornered.

So you’re wrong, and you’re wrong again.