- that must be done because of a law or a rule synonym mandatory
- English is a compulsory subject at this level.
- compulsory education/schooling
- The strikers are protesting against the threat of compulsory redundancies.
- it is compulsory (for somebody/something) to do something It is compulsory for all motorcyclists to wear helmets.
Oxford Collocations DictionaryCompulsory is used with these nouns:- attendance
- conscription
- education
- …
Word Originearly 16th cent. (as a noun denoting a legal mandate which had to be obeyed): from medieval Latin compulsorius, from compuls- ‘driven, forced’, from the verb compellere, from com- ‘together’ + pellere ‘drive’.
Check pronunciation:
compulsory