Definition of holy island:
(n) :
An island, civil parish, and village thereon, off the coast of Northumberland, England (OS grid ref NU1242).
(n) :
An island off the west coast of Anglesey, Wales, the location of Holyhead (OS grid ref SH28).
(n) :
An island off Arran in the Firth of Clyde, North Ayrshire council area, Scotland (OS grid ref NS0530).
(n) :
An island off the coast of Massachusetts, United States, which is part of Essex County.
(n) :
An island in Lake Charlevoix, Charlevoix County, Michigan, United States.