whereof

1 of 2

conjunction

where·​of (h)wer-ˈəv 

-ˈäv,

(ˌ)(h)wər-

1

archaic : with or by which

2

: of what

knows whereof she speaks

3

a

: of which

books whereof the best are lost

b

: of whom

whereof

2 of 2

adverb

archaic

: of what

whereof are you made

—William Shakespeare

Examples of whereof in a Sentence

Recent Examples on the Web

Adverb

Neither slavery nor involuntary servitude, except as a punishment for crime whereof the party shall have been duly convicted, shall exist within the United States, or any place subject to their jurisdiction. —Michael Harriot, The Root, 12 June 2017

Word History

First Known Use

Conjunction

13th century, in the meaning defined at sense 1

Adverb

13th century, in the meaning defined above

Kids Definition

whereof

conjunction

where·​of

-ˈəv,

-ˈäv

1

: of what

knows whereof she speaks

2

: of which or whom

wrote many books whereof the best are lost