n. Function: adjective
containing or constituting a command FF1C; mandatory entrance examinations FF1E;
Synonyms: compulsatory, compulsory, imperative, imperious, obligatory, required
Related Words: essential, indispensable, irremissible, necessary, needful, requisite; binding, commanding, compelling, de rigueur; forced, involuntary
Contrasted Words: discretionary, elective, voluntary
Antonyms: optional