The Collaborative International Dictionary of English v.0.48:
Supereminence \Su`per*em"i*nence\, Supereminency \Su`per*em"i*nen*cy\, n. [L. supereminentia.] The quality or state of being supereminent; distinguished eminence; as, the supereminence of Cicero as an orator, or Lord Chatham as a statesman. --Ayliffe. [1913 Webster] He was not forever beset with the consciousness of his own supereminence. --Prof. Wilson. [1913 Webster]