Source : Webster's Revised Unabridged Dictionary (1913)

Imperiality \Im*pe`ri*al"i*ty\, n.; pl. {Imperialities}.
   1. Imperial power.

   2. An imperial right or privilegs. See {Royalty}.

            The late empress having, by ukases of grace,
            relinquished her imperialities on the private mines,
            viz., the tenths of the copper, iron, silver and
            gold.                                 --W. Tooke.