noun Date: 1865 a title (as “Lord” added to the Christian name of a peer's younger son) used in addressing certain lineal relatives of British peers, a title (as “Professor” for any teacher) taken by the user and commonly accepted without consideration of official right
COURTESY TITLE
Meaning of COURTESY TITLE in English
Merriam Webster. Explanatory English dictionary Merriam Webster. Толковый словарь английского языка Мерриам-Уэбстер. 2012