1590s, from Latin peregrinatus, past participle of peregrinari "to travel abroad, be alien," figuratively "to wander, roam, travel about," from peregrinus "from foreign parts, foreigner," from peregre (adv.) "abroad," properly "from abroad, found outside Roman territory," from per "away" (see per) + agri, locative of ager "field, territory, land, country" (from PIE root *agro- "field").
