1. Italian antipope from 1080 to 1100 who was installed as pope by the Holy Roman Emperor Henry IV who consistently opposed efforts at papal reform (died in 1100); [syn: Clement III, Guibert of Ravenna]
WordNet (r) 3.0 (2006):
Guibert of Ravenna
n 1: Italian antipope from 1080 to 1100 who was installed as
pope by the Holy Roman Emperor Henry IV who consistently
opposed efforts at papal reform (died in 1100) [syn:
Clement III, Guibert of Ravenna]