In the context of computer science (specifically the binary tree data structure) bushy refers to a tree in which most nodes have their full load of children. (In the case of a binary tree, this is two)

Having bushy trees is nice for tree operations as the more bushy a binary or other type of search tree is, the faster the operation can be completed.

Bush"y (?), a. [From 1st Bush.]

1.

Thick and spreading, like a bush.

"Bushy eyebrows."

Irving.

2.

Full of bushes; overgrowing with shrubs.

Dingle, or bushy dell, of this wild wood. Milton.

 

© Webster 1913.