Against or opposed to one’s own interests. This adjective is used to describe several legal concepts. For example:

An adverse party would be the one having interests contrary to you. In property law, adverse possession refers to the...

Adverse Interest

There are three main types of adverse interests.

1) An adverse interest can mean an interest, claim or right that is against another’s interest. For example, a plaintiff and defendant...

Adverse Party

The opposing party, or anyone who has interests contrary to yours in a lawsuit.

Adverse Witness

An adverse witness, sometimes referred to as a hostile witness, is one who identifies with the opposing party because of a relationship or a common interest in the outcome of the litigation. For example, in a criminal case brought by a state against...

Advisory Opinion

A court's nonbinding interpretation of law. It states the opinion of a court upon a legal question submitted by a legislature, government official, or another court. Federal courts cannot issue advisory opinions because of the Constitution's case-or-...


1. Someone who actively promotes the interests of another person or enterprise. This may involve filing claims, defending against the claims of others, and persuading other parties (e.g., government officials) to act favorably towards the relevant...


The author of an affidavit, who swears to its accuracy.


A voluntarily sworn declaration of written facts. Affidavits are commonly used to present evidence in court. see, e.g. Edenfield v. Fane, 507 US 761 (1993).

See Category: Courts and Procedure


There are several, related usages of the word “affirm” in a legal context; but, generally it means “to confirm or ratify.” Common occurrences of this word include:

An appellate court can affirm the ruling that was the subject of the appeal...

After-Discovered Evidence


In a civil or criminal case, evidence that existed at the time of a motion or trial but that could not have been discovered with reasonable diligence prior to a court ruling upon the motion or the trial's completion. Upon later discovery, a...