Definition of domesday:
(n) :
Obsolete form of doomsday. [The day when God is expected to judge the world; the end times.]
(n) :
Ellipsis of Domesday Book. [(historical) The Book of Winchester; the principal record of the Domesday survey of England carried out in 1086 for William the Conqueror, comprising of two volumes: the Great Domesday Book and the Little Domesday Book.]
(n) :
Ellipsis of Domesday survey. [The great Norman survey of England carried out in 1086 for William the Conqueror, the returns from which are recorded in the Domesday Book.]