Definitions for: Bonanza

[n] a sudden happening that brings very good fortune
[n] an especially rich vein of precious ore

Webster (1913) Definition: Bo*nan"za, 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.]

Synonyms: boom, manna from heaven

See Also: happening, mineral vein, natural event, occurrence, vein