A crash refers to a sudden dramatic loss in value of the market, which can last for months or years. Generally, market crashes when a large number of investors invest in the stock market to such an extent that the price of the stocks inflates.

(of a vehicle on the ground) to hit another vehicle or a large object violently, or (of an aircraft) to fall and violently hit the ground, a building, etc., or hit another aircraft while flying: [ I ] The plane crashed into the mountainside, killing all aboard. crash. adjective.