In trials, each party calls witnesses. Each party may also question the other's witness(es). When you ask questions of the other party's witness(es), it is called a "cross-examination" and you are allowed considerably more latitude in cross-examination then when you question your own witnesses (called an " examination-in-chief "). For example, you are not allowed to ask leading questions to your own witness whereas you can in cross-examination.
CROSS-EXAMINATION
Meaning of CROSS-EXAMINATION in English
Duhaime's Law English dictionary. Английский юридический словарь Duhaime . 2012