gregorian Meaning, Definition & Usage

  1. adjective of or relating to Pope Gregory I or to the plainsong chants of the Roman Catholic Church
  2. adjective of or relating to Pope Gregory XIII or the calendar he introduced in 1582

WordNet

Gre*go"ri*an adjective
Etymology
NL. Gregorianus, fr. Gregorius Gregory, Gr. : cf. F. grégorien.
Definitions
  1. Pertaining to, or originated by, some person named Gregory, especially one of the popes of that name.

Webster 1913