Definition of clactonian:
(adj) :
Of or from Clacton (especially from Clacton-on-Sea)
(adj) :
(archaeology) Belonging or relating to a class of ancient tools fashioned from flakes chipped off flint cores.
(n) :
(archaeology) One of the ancient people who fashioned Clactonian tools.
(adj) :
Alternative form of Clactonian. [Of or from Clacton (especially from Clacton-on-Sea)]