Page "Metonymy" Paragraph 17

Within logical polysemies, a large class of mappings may be considered to be a case of metonymic transfer ( e. g., chicken for the animal, as well as its meat ; crown for the object, as well as the institution ).

Other cases wherein the meaning is polysemous, however, may turn out to be more metaphorical, e. g., eye as in the eye of the needle.