The headword, here unglossed, is glossed by Hesychius s.v. with the noun paroikos; for this conjunction cf. pi 732 (end), an abridged quotation of Psalm 38.13 LXX (cf. Genesis 23.4). LSJ translates it as 'sojourning in a strange place, esp. as Subst.'; but the more mundane sense of foreign visitor as opposed to resident in conveyed in e.g. Aristophanes of Byzantium's definition of a metoikos ('for so many days he is called parepidemos and is free of tax...'); see D. Whitehead, The Ideology of the Athenian Metic (Cambridge 1977) 7-8.
[1] The quotation approximates Marcus Aurelius, Meditations 2.17.2, although the latter uses e)pidhmi/a, a stay in a strange place. Adler's critical apparatus also refers to Aeschines Socraticus, Axiochus fr.3 Dittmar; cf. alpha 2822. But in this work, Aeschines (alphaiota 346, cf. alphaiota 349) marshals a broadside assault upon the moral character of Alkibiades (alpha 1280), and the dialogue's few extant fragments appear unrelated to the present Suda passage. See rather a passage (quoted in Stobaeus) from the pseudo-Platonic dialogue of the same name, Axiochus 365B, where this image is already described as a cliche: parepidhmi/a ti/s e)stin o( bi/os, life is something of a sojourn [sc. in a strange place].