mandatary, mandatory -- (the recipient of a mandate)
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 are able to stand by themselves)
Overview of adj mandatory
The adj mandatory has 1 sense
compulsory, mandatory, required -- (required by rule; "in most schools physical education is compulsory"; "attendance is mandatory"; "required reading")