Noun
A trope in which one word is put for another that suggests it; as, we say, a man keeps a good table instead of good provisions; we read Virgil, that is, his poems; a man has a warm heart, that is, warm affections.
Source: Webster's dictionaryIn cases that a metonymic shift would be otherwise revealed nearby, the whole sentence may be recast to avoid the metonymy. Source: Internet
Exhibition design has as multitude of strategies, theories, and methods but two that embody much of the theory and dialogue surrounding exhibition design are the metonymy technique and the use of authentic artifacts to provide the historical narrative. Source: Internet
Metaphor and analogy both work by bringing together two concepts from different conceptual domains, whereas metonymy works by using one element from a given domain to refer to another closely related element. Source: Internet
Some cancer patients treat the loss of their hair from chemotherapy as a metonymy or metaphor for all the losses caused by the disease. Source: Internet
Such a use of metonymy contributes to the dehumanization of the victims as they are reduced to a heap of indistinguishable objects and their individuality subsumed by an aesthetic of anonymity and excess." Source: Internet
Thus, a metaphor creates new links between otherwise distinct conceptual domains, whereas a metonymy relies on the existing links within them. Source: Internet