This paper discusses the polysemy of Mandarin GUO from the perspective of
cognitive grammar, which equates meaning to conceptualization in the broad
sense. The related senses of GUO are closely examined within a single category
and across categories, and are subject to a variety of substructure designations
from the relevant bases. In the characterization of spatial schemas, metaphor
provides a convenient avenue to enrich the polysemy by mapping one cognitive
domain to another. A comparison between GUO and cross/across in English
indicates that conceptualizations of linguistic forms are to some extent language-specific.