witness

1 of 2

noun

wit·​ness ˈwit-nəs 

1

: attestation of a fact or event : testimony

2

: one that gives evidence

specifically : one who testifies in a cause or before a judicial tribunal

3

: one asked to be present at a transaction so as to be able to testify to its having taken place

4

: one who has personal knowledge of something

5

a

: something serving as evidence or proof : sign

b

: public affirmation by word or example of usually religious faith or conviction

the heroic witness to divine life

—Pilot

6

capitalized : a member of the Jehovah's Witnesses

witness

2 of 2

verb

witnessed; witnessing; witnesses

transitive verb

1

: to testify to : attest

2

: to act as legal witness of

3

: to furnish proof of : betoken

4

a

: to have personal or direct cognizance of : see for oneself

witnessed the historic event

b

: to take note of

our grammar—witness our verb system—is a marvel of flexibility, variety, and exactitude

—Charlton Laird

5

: to constitute the scene or time of

structures … which this striking Dorset hilltop once witnessed

—The Times Literary Supplement (London)

intransitive verb

1

: to bear witness : testify

2

: to bear witness to one's religious convictions

opportunity to witness for Christ

—Billy Graham

Synonyms

Noun

• testimony
• evidence
• proof
• testament

Verb

• attest
• certify
• guarantee
• testify (to)
• affirm
• authenticate
• vouch (for)
• assert

Choose the Right Synonym for witness

certify, attest, witness, vouch mean to testify to the truth or genuineness of something.

certify usually applies to a written statement, especially one carrying a signature or seal.

certified that the candidate had met all requirements

attest applies to oral or written testimony usually from experts or witnesses.

attested to the authenticity of the document

witness applies to the subscribing of one's own name to a document as evidence of its genuineness.

witnessed the signing of the will

vouch applies to one who testifies as a competent authority or a reliable person.

willing to vouch for her integrity

Examples of witness in a Sentence

Noun

The defense called its first witness to the stand.

a witness for the defense

His aunt and uncle were witnesses at his baptism.

There must be two witnesses present when she signs the document.

Verb

Several people witnessed the accident.

We are witnessing a historic moment.

He witnessed the signing of her will.

Recent Examples on the Web

Noun

However, Moore testified on behalf of the prosecution and was a key witness in their effort to convict Wuornos. —Caroline Blair, PEOPLE, 30 Oct. 2025

The $40 million civil trial filed by first-grade teacher Abigail Zwerner, who was shot by a 6-year-old student in 2023 with a 9 mm handgun, entered its opening phase Tuesday as attorneys delivered their opening remarks and the first witnesses took the stand. —Sarah Rumpf-Whitten, FOXNews.com, 29 Oct. 2025

Verb

The same Philadelphia that witnessed the birth of American independence also nurtured competing visions of nationhood—ones that challenged the very foundations of who could claim full citizenship in the republic. —Literary Hub, 28 Oct. 2025

Sheriff’s officials said that Jaekel also asked one of the children for nude pictures of herself and that each of the four victims witnessed Jaekel inappropriately touching the other female family members. —Rosalio Ahumada, Sacbee.com, 28 Oct. 2025

Word History

Etymology

Noun

Middle English witnesse, from Old English witnes knowledge, testimony, witness, from wit entry 1

First Known Use

Noun

before the 12th century, in the meaning defined at sense 1

Verb

14th century, in the meaning defined at transitive sense 1

Phrases Containing witness

• alibi witness
• bearing false witness
• bear witness
• be witness to
• character witness
• expert witness
• (give) witness to
• hostile witness
• witness-box
• witness stand
• witness tampering

Rhymes for witness

• fitness
• eyewitness
• unfitness

Kids Definition

witness

1 of 2 noun

wit·​ness ˈwit-nəs 

1

: testimony sense 1

bear false witness

2

: one who gives evidence especially before a court of law

3

a

: one present at an action (as a wedding) who can testify to its having taken place

b

: one who has personal knowledge or experience of something

4

a

: something serving as evidence or proof : sign

b

: public affirmation of usually religious conviction

witness

2 of 2 verb

1

: to give testimony to : testify

2

: to act as legal witness of

witness a document

3

: to be or give proof of

their actions witness their guilt

4

: to have personal knowledge of : see for oneself

had witnessed the accident

5

: to publicly assert one's religious convictions

Legal Definition

witness

1 of 3 noun

wit·​ness

1

a

: attestation of a fact or event

in witness whereof the parties have executed this release

b

: evidence (as of the authenticity of a conveyance by deed) furnished by signature, oath, or seal

2

: one who gives evidence regarding matters of fact under inquiry

specifically : one who testifies or is legally qualified to testify in a case or to give evidence before a judicial tribunal or similar inquiry

a witness before a congressional committee

no person…shall be compelled in any criminal case to be a witness against himself

—U.S. Constitution amend. V

compare affiant, deponent

— adverse witness

: a witness who is called by or associated with an opposing party or who by statement, conduct, or other evidence (as of relationship) shows bias against or is injurious to the case of the party by whom the witness is called

sought to have his witness declared an adverse witness subject to impeachment

called also hostile witness

see also leading question at question sense 1

— alibi witness

: a witness upon whom a criminal defendant relies in establishing an alibi

— character witness

: a witness who testifies as to the character or reputation especially of a criminal defendant : a witness who gives character evidence

— expert witness

: a witness (as a medical specialist) who by virtue of special knowledge, skill, training, or experience is qualified to provide testimony to aid the factfinder in matters that exceed the common knowledge of ordinary people

— hostile witness

: adverse witness in this entry

— lay witness

: a witness who is not an expert witness

— material witness

: a witness whose testimony is necessary for trial and whose presence may sometimes be secured by the state by subpoena, custody, or recognizance

— prosecuting witness

: a witness (as the victim of a crime) whose own allegations initiate the prosecution of the defendant

— qualified witness

: a witness who has sufficient understanding of a record-keeping system to provide testimony that forms the proper foundation for admission of evidence under the business records exception to the hearsay rule

— rebuttal witness

: a witness called upon to rebut evidence already presented

3

: one who is called on to be present at a transaction so as to be able to testify to its occurrence

specifically : one who sees the execution of an instrument and signs it to confirm its authenticity

a witness to a will

4

: eyewitness

a witness to an assault

witness

2 of 3 transitive verb

1

: to furnish evidence or proof of

2

: to act as witness of: as

a

: to see the execution of (an instrument) and sign for the purpose of establishing authenticity

witness a will

b

: to be formally present as a witness of (as a transaction or the execution of a convict)

3

a

: to see or experience directly

b

: to take note of

intransitive verb

: to bear witness : give evidence

witness

3 of 3 adjective

: being an object or location used to ascertain a precise boundary point especially on a corner of a tract when marking that point itself is impracticable or impossible

a witness tree

a witness corner

Etymology

Noun

Old English witnes knowledge, testimony, witness, from wit mind, sense, knowledge