Signor is defined as man or mister in Italian, generally as a sign of respect.
An example of signor is Signor Tambini which means Mr. Tambini.
-  Mr.: Italian title of respect, used before the name
- a man; gentleman
Origin of signorIt, reduced form of signore: see signore
nounpl. si·gno·ri, also si·gnors or si·gniors Abbr. Sig. or S.
Used as a courtesy title for a man in an Italian-speaking area, equivalent to Mr.
Origin of signorItalian variant of signore ; see signore .