plummetplum·met /ˈplʌmɪt/ verb [intransitiveI, transitiveT] to suddenly and quickly go down in value or amountSYN PLUNGEHouse prices have plummeted.
The Nikkei index plummeted by 577.38 points yesterday.
Its stock plummeted 19% after an investment analyst said the company has had trouble selling its Internet commerce technology.
—plummet noun [countableC]Reacting to Friday’s plummet, prices firmed up again as traders regained their optimism.