An amicus curiae brief is filed by a non-party to provide perspective on the broader implications of a case.

An appeal is review of a trial court's judgment by a higher court for legal error, decided on the existing record without new evidence.

An appellate brief presents the legal argument on appeal, structured by issue with record citations and the standard of review.

An appellate panel is the group of judges, typically three, assigned to decide an appeal.

The collateral order doctrine permits immediate appeal of orders conclusively resolving important issues separate from the merits.

A cross-appeal seeks to alter the judgment in the appellee's favor, distinguished from defending it on other grounds.

En banc review is reconsideration by the full court rather than the three-judge panel that decided the appeal.

An interlocutory appeal is review of a non-final order, permitted only through specific statutory or rule-based gateways.

The mandate is the appellate court's formal transmission of its judgment, returning jurisdiction to the lower court.

A notice of appeal is the short filing that initiates an appeal, and its deadline is jurisdictional and generally cannot be extended.

Appellate oral argument is the panel's opportunity to question counsel about the briefed issues.

A petition for certiorari seeks discretionary review by a court of last resort in state or federal systems.

A petition for certiorari asks the Supreme Court to review a lower court decision, granted at its discretion.

The record on appeal comprises the materials the appellate court may consider in reviewing the judgment.

A Rule 23(f) appeal is a discretionary interlocutory appeal from an order granting or denying class certification.

Rule 54(b) certification permits immediate appeal of a judgment resolving fewer than all claims or parties.

Section 1292(b) certification permits discretionary appeal of a non-final order involving a controlling question of law.