Definition of "wherein" in English

adverb

1. How, or in what way.

   • Wherein did I misspeak myself?
   • Wherein have I sinned, that thou wouldest deliver thy servant into the hand of Ahab, to slay me?

conjunction

1. Where, or in which location.

2. During which.

3. How, or in what way.

   • In order to show them wherein they were wrong, Samuel was instructed to bear witness against them […]