Given appropriate context, indeterminacy may
arise when a metonymic vehicle, i.e. the source, can be
simultaneously linked to more than one metonymic target. We claim
that this situation, akin to the phenomenon of metalepsis or
transgression in narratology, is not rare, but quite usual, and even
regular in certain contexts. This may lead to an increase of a
second-order type of anisomorphy, but ultimately leaves space for
dynamic meaning construal and optimizes texts coherence. In order to
accommodate metalepsis, we argue for an approach to metonymy not
based on mappings but on the activation of the source conceptual
cluster opening a mental space dynamically expanded or reduced so as
to fit the conceptual frame provided by the co(n)text of use.