puel·che \ˈpwelchē\noun (pluralpuelcheorpuelches) Usage: usually capitalized Etymology: Spanish, from Araucanian 1. a.: a people of the Argentine pampas b.: a member of such people 2. a.: the language of the Puelche people b.: a language stock comprising the Puelche language • puel·che·an\-chēən\adjective, usually capitalized