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incumbent

1 incumbent /ɪnˈkʌmbənt/ noun
plural incumbents
1 incumbent
/ɪnˈkʌmbənt/
noun
plural incumbents
Britannica Dictionary definition of INCUMBENT
[count]
: a person who holds a particular office or position
2 incumbent /ɪnˈkʌmbənt/ adjective
2 incumbent
/ɪnˈkʌmbənt/
adjective
Britannica Dictionary definition of INCUMBENT
always used before a noun formal
: holding an office or position

incumbent on

formal or incumbent upon
: necessary as a duty for (someone)