assoluta

The signora is my second wife; she is prima donna assoluta of the grand opera, Naples.
The Martian|George Du Maurier
Ibid.: 'L'autorit del quale cosi assoluta, che con verit si puo dire essere egli il re e governatore di quella monarchia'
A History of England Principally in the Seventeenth Century, Volume I (of 6)|Leopold von Ranke
He, Mr. Churchill, and Mr. Lloyd George might almost have been called rivals for the rle of prima ballerina assoluta.
Experiences of a Dug-out, 1914-1918|Sir Stanley Maude
Storace, the prima donna assoluta of the King's Theatre, would not accompany the other singers to Paris.
History of the Opera from its Origin in Italy to the present Time|Henry Sutherland Edwards

Thus, for twelve years the Baroness had filled the part in her household of prima donna assoluta, without a rival.
Cousin Betty|Honore de Balzac