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mandatory - definition and synonyms

 
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adjective     mandatory pronunciation in British English
/ˈmændət(ə)ri/
  1. ordered by a law or rule
    mandatory for:

    A new accounting system will soon become mandatory for all departments.

    it is mandatory to do something:

    It’s mandatory to wear a seat belt in the UK.

    a mandatory sentence:

    The trial judge imposed the mandatory sentence of life imprisonment.

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