Entry from British & World English dictionary
A conference held in Whitby in 664 that resolved the differences between the Celtic and Roman forms of Christian worship in England, in particular the method of calculating the date of Easter. King Oswy (612–70) of Northumbria decided in favour of Rome, and England as a result effectively severed the connection with the Celtic Church.
Definition of Whitby, Synod of in:
- The British & World English dictionary