Definitions
a sudden happening that brings good fortune (as a sudden opportunity to make money)
Word origin
Borrowed from Spanish bonanza (“dead calm, fair weather, good luck, rich lode”), from Vulgar Latin *bonacia (“lull, dead calm”), in turn from Latin malacia (“calm sea”), influenced by bonus (“good”) under the false impression that initial mal- is a derivate of malus (“bad”).
Used in a sentence
“The popular show quickly became a ratings bonanza for the network.”
Source: Wiktionary, CC BY-SA 4.0
Used as a crossword answer1 curated clues
01“Unexpected windfall”7 letters
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