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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

shared by two or more parties; reciprocal

Contaminated with harmful or poisonous substances.

causing admiration or respect; remarkable

Kept secret, especially because it would not be approved of.

relating to all the countries of North, Central, and South America

separate or disconnected; showing a lack of emotional involvement