Tree that has been uprooted or broken off by wind. 

A sudden, unexpected sum of money or piece of good fortune received by someone.

mid-15c., from wind (n.1) + fall (n.1). Originally literal, in reference to wood or fruit blown down by the wind, and thus free to all. Figurative sense of "unexpected acquisition" is record [..]

A fruit which has fallen off the tree on to the ground; it should be eaten immediately as it will quickly start to rot.

fruit that has fallen from the tree boom: a sudden happening that brings good fortune (as a sudden opportunity to make money); "the demand for testing has created a boom for those unregul [..]

Definition Money received which was not expected and not a direct result of something the recipient did.

An unexpected legacy, or other gain.

Unexpected legacy; money which has come de cœlo. Some of the English nobility were forbidden by the tenure of their estates to fell timber, all the trees being reserved for the use of the Roy [..]

This is synonymous with a stroke of luck, a turn of luck, or a financial gain. Originally the word was used to refer to a rush of wind which would help a vessel's forward movement.  Today, it mea [..]

Some English landowners were prevented to either fall or sell timber as this was reserved for building ships for the Royal Navy . However, this did not apply to trees which were blown down. Hence, a w [..]

A sudden unexpected rush of wind from a mountainous shore which allowed a ship more leeway.

1. a rush of wind from the high land.   2. a stroke of good luck

A site coming forward for development that has not previously been identified for development.