Mandatory lease riders nyc. 3. Mandatory definition: authoritatively ordered; obligatory; compulsory. Learn more. The meaning of MANDATORY is required by a law or rule : obligatory. See examples of MANDATORY used in a sentence. Definition of mandatory adjective in Oxford Advanced Learner's Dictionary. . Sep 7, 2025 · From Late Latin mandatorius (“of or belonging to a mandator”), from mandātor (“one who commands”), equivalent to mandate + -ory; see mandate. Required or commanded by authority; obligatory: Attendance at the meeting is mandatory. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more. 4edh9tvhychahbsvzbfdqgjlrb9eamxfyoef8stsvynww4cpf