\ ˈfȯl-tē \
faultier; faultiest

Definition of faulty

: marked by fault or defect : imperfect

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Other Words from faulty

faultily \ ˈfȯl-​tə-​lē \ adverb
faultiness \ ˈfȯl-​tē-​nəs \ 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

This utter unattainability stems from the fact that most health standards and diagnoses are based on faulty metrics of what a body should look like or be. Caroline Rothstein, Marie Claire, "The Wellness Industry Isn't Making You Well," 1 Jan. 2019 According to the mining company, the autonomous trains make sure the rails are clear ahead and monitor internal systems as well, checking for faulty wheels or couplers and bringing the train to a stop if there's a problem. Megan Geuss, Ars Technica, "Mining co. says first autonomous freight train network fully operational," 30 Dec. 2018 That launch was cancelled minutes before liftoff when technicians spotted a faulty readout on the sensors equipped on the first-stage booster. Avery Thompson, Popular Mechanics, "SpaceX Rocket Launch Delayed for the Third Time This Week," 20 Dec. 2018 Defense attorneys argued Jerome Johnson had been convicted on faulty witness testimony. James Hohmann, Washington Post, "The Daily 202: 10 stories illuminate the Trump doctrine on foreign policy," 5 July 2018 Potentially faulty or misleading airspeed indications in the cockpit have already emerged as an initial focus of safety experts delving into the crash, according to industry officials tracking the investigation. I Made Sentana, WSJ, "Last Four Flights of Crashed Lion Air Jet Had Problems With Airspeed Indicator," 5 Nov. 2018 He had been convicted on inconsistent and faulty witness testimony, his defense attorneys and prosecutors say. Tim Prudente, Washington Post, "Baltimore man exonerated of murder after 30 years in prison," 4 July 2018 Apopka, which treats and distributes 3 billion gallons of water annually to a population of 51,500, has focused on its faulty or failing smart meters. Stephen Hudak, OrlandoSentinel.com, "Apopka cuts water loss with new 'smart' meters as part of $4.6 million upgrade," 11 June 2018 Months before the state moved to suspend most operations at a Union County youth psychiatric center, investigators had documented possible abuse and faulty treatment. Cassie Cope And Fred Clasen-kelly, charlotteobserver, "Youth psych center faced abuse allegations. So why did Cardinal keep sending patients?," 8 June 2018

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

19 Jan 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 \
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

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