1.necessary for (someone) as a duty or responsibility.“it is incumbent on all decent people to concentrate on destroying this evil”
synonyms: necessary for one to, essential that, required that, imperative that;compulsory for one to, binding on one to, mandatory that“it is incumbent on you to tell them”
2.(of an official or regime) currently holding office.“the incumbent president had been defeated”
synonyms: current, present, in office, in power;reigning“the incumbent president”
1.the holder of an office or post.
synonyms: holder, bearer, occupant