1. authoritatively ordered; obligatory; compulsory: It is mandatory that all students take two years of math.
  2. pertaining to, of the nature of, or containing a command.
  3. Law. permitting no option; not to be disregarded or modified: a mandatory clause.
  4. having received a mandate, as a nation.

noun, plural man·da·to·ries.

  1. mandatary.


  1. having the nature or powers of a mandate
  2. obligatory; compulsory
  3. (of a state) having received a mandate over some territory

noun plural -ries

  1. Also called: mandatary a person or state holding a mandate

adj.1570s, “of the nature of a mandate,” from Late Latin mandatorius “pertaining to a mandator,” from Latin mandatus, past participle of mandare (see mandate (n.)). Sense of “obligatory because commanded” is from 1818.

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