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compulsory

adjective

/kəmˈpʌlsəri/

Meaning

Required by law or a rule; obligatory.

Wearing seat belts is compulsory in most countries.

mandatory, required, obligatory, necessary

optional, voluntary, discretionary

compulsory education, compulsory subject, compulsory service

Of such excellence, grandeur, or beauty as to inspire great admiration or awe.

Based on personal accounts rather than facts or research; characterized by anecdotes.

having a loud, mournful sound; resonant

Occurring, operating, or done at the same time.

Able to be expressed or measured as a quantity.

causing or able to cause death; extremely dangerous; lethal