Definition of expert witness in English:

expert witness


  • A person whose level of specialized knowledge or skill in a particular field qualifies them to present their opinion about the facts of a case during legal proceedings.

    • ‘He's also a forensic psychiatrist - one of those guys who testifies as an expert witness in court trials.’
    • ‘Once I worked on a case where we had retained an expert witness who was a retired cop to testify about security.’
    • ‘For reasons already given, I do not regard the evidence of either expert witness to be of primary assistance on this point.’
    • ‘He frequently consults for museums and acts as an expert witness at trials.’
    • ‘An FBI expert witness testified that there was enough plastic explosive hidden in his shoes to blow a large hole in the airplane.’