<p><strong>Noun</strong></p><ul><li>an unexpected gain, piece of good fortune, or the like: I've recently come into a windfall and am considering early retirement.</li><li>an unexpected positive result or by-product: The industry’s profits are a windfall of war.</li><li>something blown down by the wind, such as fruit or a tree: We'll have plenty of firewood for winter, as there are a lot of pine windfalls around.</li><li>the fall of something blown down by the wind: The orchard must be sheltered from prevailing winds, as a windfall of peaches too early in the season can be disastrous.</li><li>a quantity or mass of trees blown down by the wind, or an area containing many such trees: The road was covered by extensive windfall which had to be cut and removed.</li></ul><p><strong>Adjective</strong></p><ul><li>(of profit or other gain) coming unexpectedly and in a large amount: One new business relationship can produce tens of thousands of dollars in windfall profits.</li><li>blown down by the wind: In addition to grain, his free-range chickens eat bugs and windfall fruit.</li></ul>