1. (n.) A man of social authority and dignity; a lord; a master; a gentleman; -- in this sense usually spelled sire.

2. (n.) A title prefixed to the Christian name of a knight or a baronet.

3. (n.) An English rendering of the Latin Dominus, the academic title of a bachelor of arts; -- formerly colloquially, and sometimes contemptuously, applied to the clergy.

4. (n.) A respectful title, used in addressing a man, without being prefixed to his name; -- used especially in speaking to elders or superiors; sometimes, also, used in the way of emphatic formality.

Herr Master Mister abecedarian assume bwana certified teacher change docent doctor dominie draw on dress in educationist educator fellow get into get on guide guru instructor maestro master melamed mentor misrepresent monsieur mullah pandit pedagogist pedagogue preceptor professor pundit put on rabbi sahib schoolkeeper schoolmaster schoolteacher signor sir slip slip on starets teacher