The Collaborative International Dictionary
Mediatize \Me"di*a*tize\, v. t. [imp. & p. p. Mediatized; p. pr. & vb. n. Mediatizing.] [Cf. F. m['e]diatiser.] To cause to act through an agent or to hold a subordinate position; to annex; -- specifically applied to the annexation during the former German empire of a smaller German state to a larger, while allowing it a nominal sovereignty, and its prince his rank.
The misfortune of being a mediatized prince.
--Beaconsfield.
Wiktionary
alt. 1 To annex a country while allowing the ruler of the country to retain certain rights 2 To mediate 3 (context obsolete English) To be mediatized by the Roman Empire vb. 1 To annex a country while allowing the ruler of the country to retain certain rights 2 To mediate 3 (context obsolete English) To be mediatized by the Roman Empire
Usage examples of "mediatize".
It's just that Hesse and Wuerttemberg have been more successful at mediatizing them—well, at mediatizing us, since I am a member of the Hessian nobility—than most other principalities.
How would it be to his advantage to bring down the abbot if the archbishop mediatized the abbey in the process?
If the bishop of Wuerzburg was going to try to use this to pull Fulda under his authority and come out of it, once the imperials eventually won this war, with an expanded sphere of influence and Fulda nothing more than one mediatized monastery .
And that he would be willing to grant a substantial number of the Twelve Points if the ram proved cooperative in the project of mediatizing the lower nobility.