Where*in" (?), adv.
1.
In which; in which place, thing, time, respect, or the like; -- used relatively.
Her clothes wherein she was clad.
Chaucer.
There are times wherein a man ought to be cautious as well as innocent.
Swift.
2.
In what; -- used interrogatively.
Yet ye say, Wherein have we wearied him!
Mal. ii. 17.
© Webster 1913.