'Windfall' definitions:

Definition of 'windfall'

From: WordNet
noun
Fruit that has fallen from the tree
noun
A sudden happening that brings good fortune (as a sudden opportunity to make money); "the demand for testing has created a boom for those unregulated laboratories where boxes of specimen jars are processed like an assembly line" [syn: boom, bonanza, gold rush, gravy, godsend, manna from heaven, windfall, bunce]

Definition of 'Windfall'

From: GCIDE
  • Windfall \Wind"fall`\, 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] [1913 Webster]

Synonyms of 'windfall'

From: Moby Thesaurus