English Reference
noun · verb

witness

n. · v.
US /ˈwɪtnəs/ UK /wˈɪtnəs/ wit·ness UK spelling witnessed, witnesses

  1. 01 B2 Upper Intermediate

    n.someone who sees an event happen, especially a crime or an accident.

    n.an individual who personally observes an event, typically a significant or traumatic occurrence.

    Simple

    Police are asking any witnesses to the accident to come forward.

    In context

    Several witnesses provided conflicting accounts of the altercation, making it difficult for the investigators to determine who had initiated the violence.

  2. 02 B2 Upper Intermediate Law

    n.a person who gives evidence in a court of law.

    n.a person called to provide testimony or evidence under oath in a judicial proceeding.

    Simple

    The witness was nervous as she stood up to answer the lawyer's questions.

    In context

    The prosecution called a surprise witness whose testimony directly contradicted the defendant's alibi for the night in question.

    deponenttestifier
  3. 03 B2 Upper Intermediate Formal Law

    n.someone who watches a formal event, like a wedding or the signing of a document, to prove it happened.

    n.a person present at a formal transaction or ceremony to attest to its authenticity.

    Simple

    You need two witnesses to sign the contract for it to be valid.

    In context

    The solicitor acted as a witness during the signing of the will to ensure all legal requirements were strictly followed.

    signatoryattestor
  4. 04 B2 Upper Intermediate

    v.to see something happen with your own eyes.

    v.to observe an event or development personally; often used for historical or significant occurrences.

    Simple

    The city has witnessed many changes over the last fifty years.

    In context

    Few people have witnessed such a dramatic transformation in the local economy within a single generation.

  5. 05 C1 Advanced FormalTechnical Law

    v.to watch someone sign a legal document and then sign it yourself to prove it is real.

    v.to attest to the genuineness of a signature or document by adding one's own signature as an observer.

    Simple

    The bank manager witnessed my signature on the loan application.

    In context

    The deed must be witnessed by an independent party who has no financial interest in the property being transferred.

    attestcountersignvalidate
  6. 06 C1 Advanced FormalLiterary

    v.to be a sign or proof of something.

    v.to serve as evidence or a clear sign of a particular quality or fact.

    Simple

    His success witnesses his hard work and dedication to the project.

    In context

    The crumbling ruins witness the former grandeur of an empire that once dominated the entire Mediterranean basin.

Usage witness the phenomenon

Some members of the public witnessed the operation in one of the three areas across the farm that the animals were in.

BBC News· 14 Aug 2026

An angling club has said a fish kill in a County Down river is the "worst environmental event" it has ever witnessed.

BBC News· 12 Aug 2026

From Middle English witnesse, from Old English ġewitnes, equivalent to wit + -ness. Cognate with Middle Dutch wetenisse (“witness, testimony”), Old High German gewiznessi (“testimony”), Icelandic vitni (“witness”).

Etymology adapted from Wiktionary, available under CC BY-SA 4.0.

This entry
Origin Old English ġewitnes
Level B2 · Upper Intermediate
Frequency Common
Updated