Русско-англо-русский юридический словарь

A cross-appeal is a request filed by an appellee requesting that a higher court review a decision made by a lower court. The difference between an appeal and a cross-appeal is essentially arbitrary and dependent only on who filed the request for a higher court's review first. The first party to file is called the petitioner or appellant, and its request for review is an appeal. If an opposing party (called the respondent or appellee) also wishes to request review of a lower court's decision, that request is called a cross-appeal. (law.cornell.edu)

The appellant is the party who, having lost part or all their claim in a lower court decision, is appealing to a higher court to have their case reconsidered. (Wikipedia)

"A ruling or case is ""overturned,"" also known as overruled, when the exact same legal issue is tried at a later time, by the same court or higher court in the same court system, but the judgment is completely opposite of the earlier decision. When this happens, the earlier ruling is invalidated and no longer good law." (eHow)

In Britain, a barrister is a lawyer who speaks in the higher courts of law on behalf of either the prosecution or the defence. (Collins COBUILD English Usage)