• The government's case rested on one key (= important ) witness.
• I was asked to testify as a defense witness (= acting to defend the person accused of committing a crime ) .
• the main prosecution witness (= acting to show that the accused person is guilty )
• He appeared as an expert witness before several government inquiries.
• You will need two witnesses to the signing of the document.
• Will you witness my signature?
* * *
The key witness for the prosecution was given police protection.
act as/appear as/be called as a witness »Doctors confirmed that he was not fit to be called as a witness in the trial.
»The police are appealing for witnesses.
»a credible/material witness
»a witness account/statement
He signed the treaty in the presence of six witnesses.
The police want to hear from anyone who witnessed the incident.
»witness an attack/crime
She asked a colleague to witness the contract.
India witnessed significant jumps in its growth rates as it opened up its economy to international trade.
Financial and business terms. 2012.