mandatory

Definitions

Required by law, rules, or regulations; compulsory.

Having the power to command or mandate.

Examples

Attendance at the safety briefing is mandatory for all employees.

Wearing a seatbelt is mandatory in this state to ensure passenger safety.

The school has made it mandatory for students to wear uniforms during the academic year.

Synonyms

compulsory obligatory required binding imperative necessary essential

Antonyms

optional voluntary discretionary elective noncompulsory unnecessary arbitrary