- required by law synonym compulsory
- The offence carries a mandatory life sentence.
- mandatory (for somebody) (to do something) It is mandatory for blood banks to test all donated blood for the virus.
Oxford Collocations DictionaryMandatory is used with these nouns:- attendance
- embargo
- evacuation
- …
Word Originlate 15th cent.: from late Latin mandatorius, from Latin mandatum ‘something commanded’.Definitions on the go
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mandatory