bonanza

[ buh-nan-zuh, boh- ]
/ bəˈnæn zə, boʊ- /

noun

a rich mass of ore, as found in mining.
a source of great and sudden wealth or luck; a spectacular windfall: The play proved to be a bonanza for its lucky backers.

Origin of bonanza

1835–45, Americanism; < Spanish: literally, smooth sea (hence, good luck, rich vein of ore), nasalized variant of Medieval Latin bonacia, equivalent to Latin bon(us) good + ( mal)acia calm sea < Greek malakía softness ( malak(ós) soft + -ia -ia)

Example sentences from the Web for bonanza

British Dictionary definitions for bonanza

bonanza
/ (bəˈnænzə) /

noun

a source, usually sudden and unexpected, of luck or wealth
US and Canadian a mine or vein rich in ore

Word Origin for bonanza

C19: from Spanish, literally: calm sea, hence, good luck, from Medieval Latin bonacia, from Latin bonus good + malacia dead calm, from Greek malakia softness