exclusion principle

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Definitions from WordNet

Noun exclusion principle has 1 sense

Pauli exclusion principle, exclusion principle - no two electrons or protons or neutrons in a given system can be in states characterized by the same set of quantum numbers
--₁ is a kind of law, law of nature

Definitions from the Web

Exclusion Principle

The Exclusion Principle refers to a fundamental concept in physics, particularly in quantum mechanics, stating that no two identical fermions can occupy the same quantum state simultaneously.

Sense 1: Physics

In physics, the Exclusion Principle is a fundamental law that prohibits two identical fermions (particles with half-integer spins) from occupying the same quantum state within an atom or a molecule.

Example Sentence: The Exclusion Principle plays a crucial role in determining the electronic structure of atoms and the behavior of matter at a microscopic level.

Sense 2: Sociology

In sociology, the Exclusion Principle refers to the social phenomenon where a group or individual is intentionally kept out or marginalized from participating in certain social, economic, or political activities.

Example Sentence: The Exclusion Principle continues to be a topic of debate when examining the discrimination and social inequalities faced by marginalized populations.

Sense 3: Mathematics

In mathematics, the Exclusion Principle is a principle that states that in counting problems, once an item or element is selected or included, it is excluded from future selections.

Example Sentence: When using the Exclusion Principle in combinatorics, we must carefully consider which elements have already been counted to avoid double-counting or omissions.