cross-ex·am·i·na·tion /ˈkrɔsɪgˌzæməˈneʃən/
cross-ex·am·i·na·tion n. Law The interrogating or questioning of a witness by the party against whom he has been called and examined. See Examination.
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cross-examination
n : (law) close questioning of a hostile witness in a court of
law to discredit or throw a new light on the testimony
already provided in direct examination