I. gri-ˈgȯr-ē-ən adjective
Date: 1592
: of or relating to Pope Gregory XIII or the Gregorian calendar
II. adjective
Date: 1653
1. : of or relating to Pope Gregory I
2. : of, relating to, or having the characteristics of Gregorian chant
III. adjective
Etymology: Saint Gregory the Illuminator died 332, apostle of Armenia
Date: 1902
: of or relating to the Armenian national church