/ ˈwɪðə(r); NAmE / adverb , conjunction
1.
( old use ) where; to which :
Whither should they go?
They did not know whither they should go.
the place whither they were sent
2.
( formal ) used to ask what is likely to happen to sth in the future :
Whither modern architecture?
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WORD ORIGIN
Old English hwider , from the Germanic base of which ; compare with hither and thither .