What does alien mean?
The definition of alien
Al”ien, a.
Etym: [OF. alien, L. alienus, fr. alius another; properly, therefore, belonging to another. See Else.]

1 Not belonging to the same country, land, or government, or to the citizens or subjects thereof; foreign; as, alien subjects, enemies, property, shores.
2 Wholly different in nature; foreign; adverse; inconsistent (with); incongruous; — followed by from or sometimes by to; as, principles alien from our religion. An alien sound of melancholy. Wordsworth. Alien enemy (Law), one who owes allegiance to a government at war with ours. Abbott.

Al”ien, n.
1 A foreigner; one owing allegiance, or belonging, to another country; a foreign-born resident of a country in which he does not posses the privileges of a citizen. Hence, a stranger. See Alienage.
2 One excluded from certain privileges; one alienated or estranged; as, aliens from God’s mercies. Aliens from the common wealth of Israel. Ephes. ii. 12.
Al”ien, v. t.
Etym: [F. aliéner, L. alienare.]

To alienate; to estrange; to transfer, as property or ownership. [R.] “It the son alien lands.” Sir M. Hale. The prince was totally aliened from all thoughts of . . . the marriage. Clarendon.