Meanings of ethnically homogenous in English

The more ethnically homogenous countries on the map include Australia, Russia and parts of Europe.

The USSR disintegrated peacefully because it disintegrated into ethnically homogenous entities (or entities with clear ethnic identities and majorities).

The Czechs separated from the Slovaks in a bloodless break-up of their common state because the two resulting entities were ethnically homogenous.

The national(istic) school supports the formation of ethnically homogenous states, if necessary, by humane and gradual (or inhuman and abrupt) ethnic cleansing.

And that population is 99% Korean: fewer than 300,000 foreigners live in Seoul, making it one of the most ethnically homogenous world capitals.