\ ˈfȯl-tē How to pronounce faulty (audio) \
faultier; faultiest

Definition of faulty

: marked by fault or defect : imperfect

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Other Words from faulty

faultily \ ˈfȯl-​tə-​lē How to pronounce faultily (audio) \ adverb
faultiness \ ˈfȯl-​tē-​nəs How to pronounce faultiness (audio) \ noun

Synonyms & Antonyms for faulty


amiss, bad, defective, flawed, imperfect


faultless, flawless, impeccable, perfect

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Examples of faulty in a Sentence

the cause of the plane crash was traced to faulty wiring

Recent Examples on the Web

The upshot is the elections of the board president and the other two were faulty. Dallas News, "He didn’t like his appraisal district, but unlike the rest of us, he did something about it," 14 July 2019 Voter confidence that Bottoms could lead one of the nation's largest cities defies both those faulty assumptions and suggestions. NBC News, "Black women mayors: A rising force in major American cities," 8 July 2019 At the center of the plan is a $21 billion insurance fund to pay claims to victims of future wildfires that are caused by faulty utility equipment. Wire Services, The Mercury News, "Newsom unveils $24B plan to tackle wildfires, PG&E bankruptcy," 21 June 2019 The foundational achievement of classical mechanics is to establish that the first point is faulty. Quanta Magazine, "Einstein’s Parable of Quantum Insanity," 10 Sep. 2015 But then Boeing later admitted a cockpit alert that can tell pilots if the sensors that trigger MCAS are faulty did not work — and the company knew for more than a year before telling the Federal Aviation Administration or the airlines. David Koenig, chicagotribune.com, "‘Miracle on the Hudson’ hero and other pilots criticize Boeing over 737 Max at House hearing," 19 June 2019 When asked about the controversy at yesterday's Senate Commerce Committee hearing, Pai said that data provided by NASA and the National Oceanic and Atmospheric Administration (NOAA) is faulty. Jon Brodkin, Ars Technica, "Ajit Pai says NOAA and NASA are wrong about 5G harming weather forecasts," 13 June 2019 The helmets worn by soldiers and Marines in Iraq and Afghanistan have also been shown to be faulty. Andrew Cockburn, Harper's magazine, "The Military-Industrial Virus," 10 June 2019 Apple recently extended its warranty program on those faulty keyboards, but the MacBook's single USB-C port still feels limiting. Scott Gilbertson, WIRED, "The Best Alternatives to Apple's Mac and MacBook," 5 June 2019

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'faulty.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of faulty

14th century, in the meaning defined above

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Dictionary Entries near faulty

fault trace

fault trough

fault vent


fault zone



Statistics for faulty

Last Updated

20 Jul 2019

Look-up Popularity

Time Traveler for faulty

The first known use of faulty was in the 14th century

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More Definitions for faulty



English Language Learners Definition of faulty

: having a mistake, fault, or weakness


\ ˈfȯl-tē How to pronounce faulty (audio) \
faultier; faultiest

Kids Definition of faulty

: having a fault, flaw, or weakness : imperfect

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More from Merriam-Webster on faulty

Rhyming Dictionary: Words that rhyme with faulty

Thesaurus: All synonyms and antonyms for faulty

Spanish Central: Translation of faulty

Nglish: Translation of faulty for Spanish Speakers

Britannica English: Translation of faulty for Arabic Speakers

Comments on faulty

What made you want to look up faulty? Please tell us where you read or heard it (including the quote, if possible).


to complain fretfully

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