[predic.](
职责所在的,义不容辞的
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it is incumbent on all decent people to concentrate on destroying this evil .集中力量消灭这类邪恶是所有正派人义不容辞的责任。
[attrib.] (of an official or regime) currently holding office
(官员)在职的,在任的;(政权)当权的
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the incumbent President had been defeated .在任总统被击败了。
denoting a company having a sizeable share of a market
(公司)占市场份额大的
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powerful incumbent airlines .占市场份额相当大的航空公司。
the holder of an office or post
现任者,在任者。
"late Middle English (as a noun): from Anglo-Latin