Etymology
Advertisement

monsieur (n.)

the common title of courtesy in France, equivalent to English mister, 1510s, from French monsieur, from mon sieur "my lord," from sieur "lord," shortened form of seigneur (see monseigneur) It was the historical title for the second son or next younger brother of the king of France.

Others are reading

Advertisement
Advertisement
Definitions of monsieur

Monsieur (n.)
used as a French courtesy title; equivalent to English `Mr';
From wordnet.princeton.edu