'Ultra-' definitions:

Definition of 'Ultra-'

From: GCIDE
  • Ultra- \Ul"tra-\, a. A prefix from the Latin ultra beyond (see Ulterior), having in composition the signification beyond, on the other side, chiefly when joined with words expressing relations of place; as, ultramarine, ultramontane, ultramundane, ultratropical, etc. In other relations it has the sense of excessively, exceedingly, beyond what is common, natural, right, or proper; as, ultraconservative; ultrademocratic, ultradespotic, ultraliberal, ultraradical, etc. [1913 Webster]

Words containing 'Ultra-'