Why nobody thinks a monarch looks like a crown
When a newspaper reports that the Crown or the White House has decided something, no one pictures jewellery or a building making choices. That shortcut is metonymy: naming a thing by something it is linked with. Unlike metaphor, it borrows no resemblance at all, only an everyday association.
The word comes from Ancient Greek metonumia, a change of name. Its classic examples are so familiar they barely register: a suit for a banker or lawyer, the press for journalists, the bench for judges, a dish for the food on it. Synecdoche, where a part stands for the whole, is usually counted as one kind of metonymy, which is why cattle are counted by the head and labourers called hands. The reverse also happens, as when police officers become the law.
The key difference from metaphor lies in how the link works. Metaphor rests on similarity; metonymy rests on contiguity, things that sit together in experience. Reporters are nothing like a printing press, and kings have no crown-like qualities, yet both substitutions work instantly. A pair of fishing phrases makes the contrast sharp. Fishing for pearls keeps the ocean in view and simply extends the act of pulling things from the sea, while fishing for information carries the patient, hopeful probing of angling into conversation, a different domain entirely.
Many words owe their double meanings to this habit. Chicken names both a bird and its meat. Capital cities stand for governments, so Westminster means Britain's rulers, while Wall Street and Hollywood stand for whole industries. The oldest case may be Pharaoh, which first meant the king's residence and by the New Kingdom meant the king. Brand names slide the same way: Hoover for any vacuum cleaner, Sellotape for any sticky tape.
Some phrases are genuinely ambiguous. Lend me your ear can be read as metonymy, with ear meaning attention, or as a metaphor built on it, and all readings land in the same place. Kenneth Burke counted metonymy among four master tropes, alongside metaphor, synecdoche and irony, and Roman Jakobson saw it as half of the most basic split in figurative language.
Source: Metonymy
