alien
US /ˈeɪ.li.ən/
UK /ˈeɪ.li.ən/

1.
alieno, straniero
a foreigner, especially one who is not a naturalized citizen of the country where they are living
:
•
The government has strict laws regarding alien residents.
Il governo ha leggi severe riguardo ai residenti stranieri.
•
He felt like an alien in his new school.
Si sentiva un estraneo nella sua nuova scuola.
2.
alieno, extraterrestre
a hypothetical or fictional being from another world; an extraterrestrial
:
•
The movie featured a friendly alien.
Il film presentava un alieno amichevole.
•
Scientists are searching for signs of alien life.
Gli scienziati cercano segni di vita aliena.
1.
alieno, estraneo
unfamiliar and disturbing or distasteful
:
•
The concept of absolute freedom was alien to him.
Il concetto di libertà assoluta gli era alieno.
•
His behavior was completely alien to his usual character.
Il suo comportamento era completamente alieno al suo solito carattere.
2.
straniero, estero
belonging to a foreign country or nation
:
•
The company deals with alien currencies.
L'azienda si occupa di valute estere.
•
They discussed the impact of alien cultures on local traditions.
Hanno discusso l'impatto delle culture aliene sulle tradizioni locali.