Meaning

noun a person who comes from a foreign country; someone who does not owe allegiance to your country

noun someone who is excluded from or is not a member of a group

originFrom Middle English forner, foreyner, foroner, forenere, augmentation of earlier forein (“foreigner”), from the adjective. Equivalent to foreign + -er. Use of the -er suffix may be due to analogy with Middle English straunger (“stranger”). Displaced native Old English elþēodiġ.

Etymology from Wiktionary, CC BY-SA 3.0