EFFENDI (a Turkish word, corrupted from the Gr., a lord or master), a title of respect, equivalent to the English "sir," in the Turkish empire and some other eastern countries. It follows the personal name, when that is used, and is generally given to members of the learned professions, and to government officials who have no higher rank, such as Bey, Pasha, etc. It may also indicate a definite office, as Hakim effendi, chief physician to the sultan. The possessive form effendim (my master) is used by servants and in formal intercourse.
Note - this article incorporates content from Encyclopaedia Britannica, Eleventh Edition, (1910-1911)