alt Hacker News>Migrant is actually the wrong word entirely, I think.
immigrant, im- (variant of in-) ; migrant into your country
emigrant, ex- ; migrant out of your country
both are still migrants. there is no specific cause for migration required to be an migrant.
you just need to move somewhere new to live.
You are technically correct. The best kind of correct!
In terms of common usage though, it's as I said, especially in North America.