(n) a sudden happening that brings good fortune (as a sudden opportunity to make money), Syn. godsend, gold rush, windfall, gravy, bonanza, bunce, manna from heaven, Example:the demand for testing has created a boom for those unregulated laboratories where boxes of specimen jars are processed like an assembly line
The Collaborative International Dictionary of English (GCIDE) v.0.53 Collaborative International Dictionary (GCIDE)
n. [ Sp., prop. calm., fair weather, prosperity, fr. L. bonus good. ] In mining, a rich mine or vein of silver or gold; hence, anything which is a mine of wealth or yields a large income. [ Colloq. U. S. ] [ 1913 Webster ]