whereof

[hwair-uhv, -ov, wair-]

adverb, conjunction

of what, which, or whom.

Origin of whereof

First recorded in 1150–1200, whereof is from the Middle English word wherof. See where, of¹

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for whereof

Historical Examples of whereof

Betty heard this speech, whereof she only fully understood the end, and trembled.
Fair Margaret
H. Rider Haggard
Whereof this letter, sealed with our affixed seal, is witness.
Albert Durer
T. Sturge Moore
The only result was that the Bishop lost 500, whereof 300 were subscribed by the people.
The Little Manx Nation - 1891
Hall Caine
Whereof, by your light, you can judge and see that it is darkness.
The Epistles of St. Peter and St. Jude Preached and Explained
Martin Luther
The devise of the Embassage from Lubber-land, whereof also a parte was made.
Christmas: Its Origin and Associations
William Francis Dawson

British Dictionary definitions for whereof

whereof

adverb

of what or which person or thing?

pronoun

of which (person or thing)the man whereof I speak is no longer alive

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

Word Origin and History for whereof

adv.

c.1200, from where + of. Cf. Swedish hveraf, Danish hvoraf, Dutch waarvan.