Definition of terms, i.e. emigre, immigrant

Just as an FYI, some paraphrased (from my Webster’s dictionary)
definitions:

refugee: someone forced to move to another country to escape danger or persecution

émigré: emigrant, especially one forced to emigrate for political reasons

emigrant: one who emigrates, [leaves one's place of abode or country for life or residence elsewhere]

immigrant: a person who comes to a country to take [...]