si·gnor also si·gnior (sēn-yôr', -yōr') n.
pl.si·gno·ri (sēn-yôr'ē, -yō'rē) also si·gniors or si·gnors Abbr. Sig. or S. Used as a courtesy title for a man in an Italian-speaking area, equivalent to Mr.
[Italian, variant of signore; see signore.]
si·gno·re (sēn-yôr'ā, -yōr'ā, -yō'rě) n.
pl.si·gno·ri (-yôr'ē, -yō'rē) Abbr. Sig. or S. Used as a form of polite address for a man in an Italian-speaking area.