Definition of grand signior in US English:

grand signior

(also grand seigneur, grand seignior)

noun

  • 1With the. Chiefly with capital initials. The Ottoman Sultan. Now historical.

  • 2A great noble; a man whose rank or position allows him to command others.

Origin

Late 16th century. Probably partly from Italian gransignore;.

Pronunciation

grand signior

/ɡrand siːnˈjɔː/