Expressio Unius Est Exclusio Alterius

/ˌɛksprɛsioʊ ˈjuːniəs ɛst ɛkskluˈsiːoʊ ælˈtɛriəs/

Definitions

  1. (n.) A principle of statutory interpretation meaning the expression of one thing implies the exclusion of others.
    The court applied expressio unius est exclusio alterius to conclude that only the listed parties could enforce the contract.

Commentary

This maxim is a tool for construing statutes or contracts; it advises that specifying certain things excludes others not mentioned, but should be applied cautiously, considering the context and purpose of the law.

This glossary is for general informational and educational purposes only. Definitions are jurisdiction-agnostic but reflect terminology and concepts primarily drawn from English and American legal traditions. Nothing herein constitutes legal advice or creates a lawyer-client relationship. Users should consult qualified counsel for advice on specific matters or jurisdictions.

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