Meaning

noun someone who journeys in foreign lands

noun one of the colonists from England who sailed to America on the Mayflower and founded the colony of Plymouth in New England in 1620

noun someone who journeys to a sacred place as an act of religious devotion

originInherited from Middle English pilegrim, from Old English pilegrī̆m, from Old French pelegrin, from Latin peregrīnus (“foreigner”). Doublet of peregrine. The change of /r…r/ to /l…r/ is an effect of dissimilation in early Romance; compare Italian pellegrino.

Etymology from Wiktionary, CC BY-SA 3.0