noun

• A town in the Allier department, Auvergne-Rhône-Alpes, France; the capital of Vichy France during World War II.
• (historical, figurative, metonymically) Vichy France; the Vichy French government.
• (derogatory, attributive) Labelling a regime that is traitorous or established in cooperation with a foreign or hostile power, especially in administration of occupied territory.
• (colloquial) Short for Vichy water. [A naturally effervescent mineral water from the springs at Vichy in France.]