(n) a sudden happening that brings good fortune (as a sudden opportunity to make money), Syn. godsend, gold rush, windfall, gravy, bonanza, bunce, manna from heaven, Example:the demand for testing has created a boom for those unregulated laboratories where boxes of specimen jars are processed like an assembly line
The Collaborative International Dictionary of English (GCIDE) v.0.53 Collaborative International Dictionary (GCIDE)
n. 1. Anything blown down or off by the wind, as fruit from a tree, or the tree itself, or a portion of a forest prostrated by a violent wind, etc. “They became a windfall upon the sudden.” Bacon. [ 1913 Webster ]
2. An unexpected legacy, or other gain. [ 1913 Webster ]
He had a mighty windfall out of doubt. B. Jonson. [ 1913 Webster ]