Noun

1. mandatary, mandatory, recipient, receiver

usage: the recipient of a mandate

2. mandate, mandatory, district, territory, territorial dominion, dominion

usage: 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

Adjective

1. compulsory, mandatory, required, obligatory (vs. optional)

usage: required by rule; "in most schools physical education is compulsory"; "attendance is mandatory"; "required reading"

See also: mandatory (Dictionary)