a resident born in or belonging to another country who has not acquired citizenship by naturalization ( distinguished from citizen ).

a foreigner.

a person who has been estranged or excluded.

a creature from outer space; extraterrestrial.

residing under a government or in a country other than that of one's birth without having or obtaining the status of citizenship there.

belonging or relating to aliens

alien property.

unlike one's own; strange; not belonging to one

alien speech.

adverse; hostile; opposed (usually fol. by to or from )

ideas alien to modern thinking.

extraterrestrial.

adjective

akin , appropriate , native , proper

noun

citizen , countryman , national , native , settler

adjective

conflicting , contrary , estranged , exotic , extraneous , extrinsic , inappropriate , incompatible , incongruous , opposed , remote , separate , unusual , strange , adventitious , adverse , contradictory , external , foreign , impertinent , incongruousremote , inconsistent , irrelevant , nonnative , unallied , unfamiliar , unsympathetic

noun

blow in * , floater , foreigner , greenhorn * , guest , immigrant , incomer , interloper , intruder , invader , migrant , newcomer , noncitizen , outsider , refugee , settler , squatter , stranger , visitor , weed * , migr , outlander , different , extraterrestrial , foreign , hostile , nonnative , nonresident , opposed , peregrine , philistine , remote , strange , tramontane , ultramontane

verb

cede , deed , grant , make over , sign over