Merriam-Webster Collegiate Dictionary - whither

 I. adverb  Etymology: Middle English, from Old English hwider; akin to Latin quis who and to Old English hider hither — more at who, hither  Date: before 12th century  1. to what place ~ will they go  2. to what situation, position, degree, or end ~ will this abuse drive him  II. conjunction  Date: before 12th century  1.  a. to what place knew ~ to go — Daniel Defoe  b. to what situation, position, degree, or end  2.  a. to the place at, in, or to which  b. to which place  3. to whatever place