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Meaning of mandatory

man•da•to•ry

Pronunciation: (man'du-tôr"ē, -tōr"ē), [key]
— adj., n., pl. -ries.
—adj.
  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. permitting no option; not to be disregarded or modified: a mandatory clause.
  4. having received a mandate, as a nation.
—n.
  1. mandatary.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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