The meaning of MANDATORY is required by a law or rule : obligatory. How to use mandatory in a sentence. Did you know?

MANDATORY definition: authoritatively ordered; obligatory; compulsory. See examples of mandatory used in a sentence.

Definition of mandatory adjective in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.

MANDATORY definition: 1. Something that is mandatory must be done, or is demanded by law: 2. Something that is mandatory…. Learn more.

1. Required or commanded by authority; obligatory: Attendance at the meeting is mandatory. 2. Of, having the nature of, or containing a mandate. 3. Holding a League of Nations mandate over a territory.

If an action or procedure is mandatory, people have to do it, because it is a rule or a law.

President Donald Trump offered a detailed account of why Vice President JD Vance was evacuated first when the shooting interrupted… The long-running legal dispute between Angelina Jolie and Brad Pitt …

There are six meanings listed in OED's entry for the word mandatory, one of which is labelled obsolete. See ‘Meaning & use’ for definitions, usage, and quotation evidence.

Apr 9, 2026 · Adjective mandatory (comparative more mandatory, superlative most mandatory) obligatory; required or commanded by authority.

mandatory definition: obligatory or compulsory by authority. Check meanings, examples, usage tips, pronunciation, domains, and related words. Discover expressions like "mandatory retirement", …