n.
Pronunciation: b ə - ' nan-z ə
Function: noun
Etymology: Spanish, literally, calm sea, from Medieval Latin bonacia, alteration of Latin malacia, from Greek malakia, literally, softness, from malakos soft
Date: 1829
1 : an exceptionally large and rich mineral deposit (as of an ore, precious metal, or petroleum)
2 a : something that is very valuable, profitable, or rewarding <a box-office bonanza > b : a very large amount <a bonanza of sympathy> c : EXTRAVAGANZA <channels planning all-day viewing bonanza s ― William Borders>