'Whereby' definitions:

Definition of 'Whereby'

From: GCIDE
  • Whereby \Where*by"\, adv. [1913 Webster]
  • 1. By which; -- used relatively. "You take my life when you take the means whereby I life." --Shak. [1913 Webster]
  • 2. By what; how; -- used interrogatively. [1913 Webster]
  • Whereby shall I know this? --Luke i. 18. [1913 Webster]