incumbent

/ɪnˈkʌmbənt/
noun
  1. A person who currently holds a particular office or position.
    • The incumbent in the race for governor is running for a second term.
    • The company's CEO is the longest-serving incumbent in the industry.
    • Challengers often struggle to defeat an incumbent.
Antonyms
adjective
  1. Currently holding a specified office or position.
    • She is the incumbent chair of the organization.
    • Incumbent members of the committee have more experience.
    • The incumbent president decided not to seek reelection.
  2. Necessary as a duty or responsibility (usually followed by 'upon' or 'on').
    • It is incumbent upon all citizens to vote.
    • The manager felt it incumbent on her to address the issue.
    • As a parent, it is incumbent on you to teach your children right from wrong.
Synonyms
Antonyms
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