- compulsory, mandatory, required - required by rule; "in most schools physical education are compulsory"; "attendance is mandatory"; "required reading"
Antonym: optional (indirect, via obligatory)
- mandatary, mandatory - the recipient of a mandate
--1 is a kind of recipient, receiver
Derived form: verb mandate1 - mandate, mandatory - a territory surrendered by Turkey or Germany after World War I and put under the tutelage of some other European power until they ar able to stand by themselves
--2 is a kind of district, territory, territorial dominion, dominion
--2 has particulars: Palestine