Sieur \Sieur\, n. [F., abbrev. from seigneur. Cf. Monsieur, Seignior.]

Sir; -- a title of respect used by the French. [1913 Webster]

Source: The Collaborative International Dictionary of English v.0.48
 

Sieur \Sieur\, n. [F., abbrev. from seigneur. Cf. Monsieur, Seignior.]

Sir; -- a title of respect used by the French.

Source: Webster's Revised Unabridged Dictionary (1913)