peripatetic (n.)

mid-15c., Peripatetik, "a disciple of Aristotle, one of the set of philosophers who followed the teachings of Aristotle," from Old French perypatetique (14c.) and directly from Medieval Latin peripateticus "pertaining to the disciples or philosophy of Aristotle," from Greek peripatētikos "given to walking about" (especially while teaching), from peripatein "walk up and down, walk about," from peri "around, about" (see peri-) + patein "to walk, tread" (see find (v.)). Aristotle's custom was to teach while strolling through the Lyceum in Athens.

In English, the philosophical meaning is older than that of "person who wanders about" (1610s). As an adjective, "walking about from place to place, itinerant," from 1640s, often with a tinge of humor. Related: Peripatetical.

peripatetic (adj.)

1560s in the philosophical sense, 1640s in the literal sense; see peripatetic (n.).

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Definitions of peripatetic from WordNet
peripatetic (adj.)
of or relating to Aristotle or his philosophy;
Synonyms: Aristotelian / Aristotelean / Aristotelic
peripatetic (adj.)
traveling especially on foot;
peripatetic country preachers
Synonyms: wayfaring
peripatetic (n.)
a person who walks from place to place;
Peripatetic (n.)
a follower of Aristotle or an adherent of Aristotelianism;
Synonyms: Aristotelian / Aristotelean