Pecheneg /ˈpɛt͡ʃənɛɡ/adjective 1noun 1forms 1 adjective1 •Of or relating to the Pecheneg people or their language. noun1 •(historical) A member of a specific semi-nomadic Turkic people from central Asia, some of whom migrated into eastern Europe.One of the earliest Arab geographers who referred to the Pechenegs in south-eastern Europe was al-Iṣṭakhrī (circa 950). — 1993 formsPechenegs