Definitions for "Whither"
To what place; -- used interrogatively; as, whither goest thou?
To what or which place; -- used relatively.
to what place; "whither go you?"
To what point, degree, end, conclusion, or design; whereunto; whereto; -- used in a sense not physical.
This is a term that generally refers to leaves as they die. They wither, or wrinkle, turn brown or other colors and finally fall from the tree. Withering is the wrinkling and turning color part of the leaf's death. The falling off the tree is called abscission.