Source : Webster's Revised Unabridged Dictionary (1913)

Signiorize \Sign"ior*ize\, v. t. [See {Seigniorize}.]
   To exercise dominion over; to lord it over. [Obs.] --Shelton.

Signiorize \Sign"ior*ize\ (s[=e]n"y[~e]r*[imac]z), v. i.
   To exercise dominion; to seigniorize. [Obs.] --Hewyt.