whereby

[ hwair-bahy, wair- ]
/ ʰwɛərˈbaɪ, wɛər- /

conjunction, adverb

by what or by which; under the terms of which.
Obsolete. by what? how?

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Think you know your presidents? Take this quiz and see if you can match the style, wit, and ideology of these memorable lines to the right POTUS.
Question 1 of 9
“I do believe that the buck stops here, that I cannot rely upon public opinion polls to tell me what is right. I do believe that right makes might and that if I am wrong, 10 angels swearing I was right would make no difference.”

Origin of whereby

First recorded in 1150–1200, whereby is from the Middle English word wherby.See where, by1
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Example sentences from the Web for whereby

British Dictionary definitions for whereby

whereby
/ (wɛəˈbaɪ) /

pronoun

by or because of whichthe means whereby he took his life

adverb

archaic how? by what means?whereby does he recognize me?
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012