Published online by Cambridge University Press: 22 December 2008
In cognitive semantics metaphors are cross-domain mappings in the conceptual system. Thus the notion of domain plays a crucial role in the theory. However, domain is never defined, but taken for granted. By means of data from language acquisition and language production and comprehension I question the cognitive status of the notion of domain. Furthermore, I demonstrate that both linguistic and nonlinguistic evidence indicate that space and time are cognitively linked in a way that makes it problematic to claim that space is mapped onto time in the development of grammatical temporal markers.