Editor's note (30 January 2016): The top of this story has been updated to reflect news that occurred in the days since it was first published.

What is an expatriate, exactly? And when is an expat an immigrant — or not?

The word expat is loaded. It carries many connotations, preconceptions and assumptions about class, education and privilege — just as the terms foreign worker, immigrant and migrant call to mind a different set of assumptions. It's front and centre currently as US President Donald Trump signed an executive order abruptly banning immigrants, short and long-term visa-holders and, for a time, green card-holders, from certain countries from entering the US.