windfall /ˈwɪnd.fɔːl/ noun4 •Something that has been blown down by the wind. •(figurative) A sudden large benefit; especially, a sudden or unexpected large amount of money, as from lottery or sweepstakes winnings or an unexpected inheritance or gift.Businessmen rushed to get every last commodity aboard a departing ship, hoping for a windfall once the world realized these would be the very last sacks of flour available, thus driving up prices. — 2004 •A fruit that has fallen from a tree naturally, as from wind.They couldn't reach the branches, so they ate the windfalls. •The act of something being blown down by wind.The danger from windfall is greatest to trees developed in dense stands, which are tall and have slender stems, and increases with the age of the stand. — 1911 formswindfalls