bəˈnænzə ˈɡəʊldˌɹʌʃ ˈɡoʊldˌɹʌʃ ˈɡɹeɪvi ˈwɪnd.fɔːl a large migration of people to a newly discovered gold field a sudden happening that brings good fortune (as a sudden opportunity to make money) the demand for testing has created a boom for those unregulated laboratories where boxes of specimen jars are processed like an assembly line