legal theory

Estoppel in Pais

Definition from Nolo’s Plain-English Law DictionarySee: equitable estoppel

Definition provided by Nolo’s Plain-English Law Dictionary.


An event that actually happened, or a statement presented as objective truth.

Fact Finder

An impartial person or persons who are to determine the facts or actualities of a case or controversy (who determines what really happened).


In a jury trial: the jury is the body that decides what really happened in the case at...


1. A cause or reason that contributes to some result.

2. An agent hired to sell property on behalf of its owner. The factor is given control and possession of the property from the start of the sale period until either the time of sale or the...

Felony Murder Doctrine

Definition from Nolo’s Plain-English Law DictionaryA rule that allows a killing that occurs in the course of a dangerous felony, even an accidental death, to be charged against the felon as first-degree murder. A felon can be guilty of murder during the...

Felony Murder Rule

The unlawful killing of another human being while engaged in the commission of or attempted commission of one of several felonies specified according to the laws of a particular jurisdiction. At common law, the "felony murder crimes" are burglary,...

First Impression

A new legal issue or interpretation that is brought before a court. In a case of first impression, the exact issue before the court has not been addressed by that court, or within that court's jurisdiction, thus there is no binding authority on that...

Jus cogens


Jus cogens (from Latin: compelling law; from English: peremptory norm) refers to certain fundamental, overriding principles of international law.


There is near-universal agreement for the existence of the category of jus cogens...

jus naturale

Definition from Nolo’s Plain-English Law Dictionary(jus natch-ray-lee) Latin for "natural law." This is a system of legal principles ostensibly derived from universal divine truths.

Definition provided by Nolo’s Plain-English Law Dictionary.


Definition from Nolo’s Plain-English Law Dictionary1) A concept of fairness and moral rightness. 2) A scheme or system of law. 3) Judges on the U.S. Supreme Court, the federal courts of appeal, and state appellate courts.

Definition provided by Nolo’s...