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