Ahteri (Akhterī, d. 968/1560-1 or 986/1578-9) is the appellation of the Turkish scholar and lexicographer Muslihuddin Mustafa b. Şemseddin el-Karahisari (Muṣliḥ al-Dīn Muṣṭafā b. Shams al-Dīn al-Ḳaraḥiṣārī), who was born in Karahısar (present-day Afyonkarahisar, in western Turkey) and taught at the Haliliye Medrese in the central Anatolian town of Kütahya. Ahteri is famous for his Arabic-Ottoman Turkish lexicon Akhterī-yi kebīr fī'l-lugha ("Primary lexicon of Ahteri"), completed in 952/1545-6. This work, also known as Akhterī-yi