incompetent
Americanadjective
-
not competent; lacking qualification or ability; incapable.
an incompetent candidate.
- Synonyms:
- unfit, inadequate, unqualified
-
characterized by or showing incompetence.
His incompetent acting ruined the play.
-
Law.
-
being unable or legally unqualified to perform specified acts or to be held legally responsible for such acts.
-
inadmissible, as evidence.
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noun
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an incompetent person; a mentally deficient person.
-
Law. a person lacking power to act with legal effectiveness.
adjective
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not possessing the necessary ability, skill, etc to do or carry out a task; incapable
-
marked by lack of ability, skill, etc
-
law not legally qualified
an incompetent witness
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(of rock strata, folds, etc) yielding readily to pressure so as to undergo structural deformation
noun
Synonym Usage
See incapable.
Other Word Forms
Etymology
Origin of incompetent
First recorded in 1590–1600; from Late Latin incompetent- (stem of incompetēns ) “unsuitable.” See in- 3, competent
Explanation
If you are incompetent, you are not able to complete a task, like if you only ever made peanut butter and jelly sandwiches — you would be incompetent in the kitchen of a fancy French restaurant. Someone who is not very good at getting a job done is incompetent. An incompetent salesperson can't sell anything. A learned professor may be quite incompetent when it comes to controlling a room full of rowdy pre-schoolers. Legally speaking, you can be declared incompetent if you do not have necessary qualifications, like being certified or licensed to do a certain job, like cut hair or fix cars.
Vocabulary lists containing incompetent
Essential Academic Vocabulary for High School Students, List 3
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Awkward Moments
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Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
Even after hiring his friend as offensive coordinator, who was clearly incompetent, or after showing himself to be inept as an offensive mind.
From Salon ● Oct. 21, 2026
While having a power of attorney designated for a person who is suffering cognitive decline is an absolute necessity, having them declared incompetent by a court is not.
From MarketWatch ● Oct. 6, 2026
Remember DOGE, the Department of Government Efficiency, Elon Musk’s chainsaw-to-the-government effort run by incompetent kids?
From Los Angeles Times ● Sep. 3, 2026
Jeffries was declared "mentally incompetent" by a court last year and said to be suffering with dementia and late onset of Alzheimer's disease.
From BBC ● Aug. 21, 2026
The canal was a flop: some parts ran uphill, apparently because of incompetent engineering, and the rest lost nine-tenths of its water to evaporation and seepage.
From "1491" by Charles C. Mann
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Get a wordDefinitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
