bonanza Meaning, Definition & Usage

noun an especially rich vein of precious ore
noun a sudden happening that brings good fortune (as a sudden opportunity to make money)
gravy; windfall; bunce; boom; manna from heaven; gold rush; godsend.
- the demand for testing has created a boom for those unregulated laboratories where boxes of specimen jars are processed like an assembly line

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.