[countable, uncountable] a formal written or spoken statement saying what you know to be true, usually in court

a formal written or spoken statement saying what you know to be true, usually in court; a sworn testimony; Her claim was supported by the testimony of several ...

Personal or documentary evidence or attestation in support of a fact or statement; hence, any form of evidence or proof.

​a formal written statement, often by a former employer, about somebody's abilities, qualities and character; a formal written statement about the quality ...

There are two meanings listed in OED's entry for the verb testimony. See 'Meaning & use' for definitions, usage, and quotation evidence.

a formal written statement, often by a former employer, about someone's abilities, qualities, and character; a formal written statement about the quality of ...

[intransitive, transitive] to make a statement that something happened or that something is true, especially as a witness in court. testify against ...

to show or be evidence that something is true synonym evidence The film testifies to the courage of ordinary people during the war.

a spoken or written statement that something is true, esp. one given in a court of law, or the act of giving such a statement:.

1[intransitive, transitive] to make a statement that something happened or that something is true, especially as a witness in court testify (against/for ...