| Noun | 1. | mandatory - the recipient of a mandate | |
| 2. | 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 themselvesPalestine - a British mandate on the east coast of the Mediterranean; divided between Jordan and Israel in 1948 | |
| Adj. | 1. | mandatory - required by rule; "in most schools physical education are compulsory"; "attendance is mandatory"; "required reading"obligatory - morally or legally constraining or binding; "attendance is obligatory"; "an obligatory contribution" | |