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

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

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

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

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