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whereof

American  
[wair-uhv, -ov, hwair-] / wɛərˈʌv, -ˈɒv, ʰwɛər- /

adverb

  1. of what, which, or whom.


whereof British  
/ wɛərˈɒv /

adverb

  1. of what or which person or thing?

"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

pronoun

  1. 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

Etymology

Origin of whereof

First recorded in 1150–1200, whereof is from the Middle English word wherof. See where, of 1

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Karmel knew whereof he quipped — he’d been fat his whole life and at one point during his “Late Late” tenure topped the scales at 420 pounds.

From Los Angeles Times • Jun. 6, 2024

Slavery and involuntary servitude are prohibited in the Nevada constitution “otherwise than in the punishment for crimes, whereof the party shall have been duly convicted.”

From Seattle Times • Feb. 23, 2023

Constitution bans slavery and involuntary servitude “except as a punishment for crime whereof the party shall have been duly convicted.”

From Washington Times • Dec. 30, 2022

“Crime or no crime, Isiah knows whereof he speaks,” Detroit Free Press, Sept. 27, 1986.

From Slate • Aug. 18, 2022

Substantial Forms, Occult Qualities, Intentional Species, Idiosyncrasies, Sympathies and Antipathies of Things, are exploded...because they are only empty Sounds, Words whereof no Man can form a certain and determinate Idea.

From "The Invention of Science" by David Wootton

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