Examination In Chief Definition: The questioning of your own witness under oath. Related Terms: Cross Examination The questioning of your own witness under oath. Witnesses are introduced to a trial by their examination-in-chief, which is when they answer questions asked by the lawyer representing the party which called them to the stand. After their examination-in-chief, the other party’s lawyer can question them too; this is called cross-examination. Categories & Topics: Civil Litigation & Evidence Law Dictionary Find you are constantly looking up definitions? Try our search provider (works in most modern browsers) If you find an error or omission in Duhaime's Legal Dictionary, or if you have legal term suggestion, we'd love to hear from you!