παροικία, παροικίας, ἡ (παροικέω, which see), a Biblical and ecclesiastical word a dwelling near or with one; hence, a sojourning, dwelling in a strange land: properly, Acts 13:17 (2 Esdr. 8:35; Psalm 119:5 (); Wis. 19:10; Prol. of Sir. 21; cf. Fritzsche on Judith 5:9). Metaphorically, the life of man here on earth, likened to a sojourning: 1 Peter 1:17 (Genesis 47:9); see παρεπίδημος (and references under παροικέω).Thayer's Greek Lexicon
Despite the prevailing mood of constricted parochialism that pervades the Christian faith and the commonly presumed vision of the Church as a world within the world, an enclave much like a gated community, the very notion of "parish" - given its Greek etymology of "paroikia" - was to begin with meant to refer to a world as the place where you're kept from forget(ting) you're not here to stay, but (moreover, immediately Boutin adds) on a journey.- Gabriel Vahanian, "Theopoetics of the World"