\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

The paper by the Justice Department’s Office of Legal Counsel offered a few faulty arguments as to why the Treasury lacked the authority to make this regulatory change. Kimberley A. Strassel, WSJ, "Trump Alone Can Cut Taxes," 12 July 2018 An old battery or a faulty charging system could alter the equation. Ray Magliozzi, courant.com, "Car Talk: It's Safe To Use Seat Heaters If Stranded In Snow," 11 July 2018 Trump is using accurate data to draw faulty conclusions. Meg Kelly, Washington Post, "Are people ‘coming back off the sidelines’ and into the workforce, as Ivanka Trump says?," 5 July 2018 There was the time when faulty sensors prevented Hadfield’s space capsule from docking with Mir, forcing him to improvise a way in. NBC News, "Why astronaut Chris Hadfield isn't afraid of death," 4 July 2018 Volkswagen also has used lots at the port to store vehicles returned because of the faulty emission equipment. Meredith Cohn, baltimoresun.com, "Maryland's $33.5 million settlement with Volkswagen in emission scandal could boost port of Baltimore," 25 Apr. 2018 More cars uncouple, and if critics are right, faulty new equipment may cause serious malfunctions of brakes, couplers, track signals, and switches. Christopher Bonanos, Daily Intelligencer, "The Subway Crisis We’ve Been Writing About for 48 Years," 17 Apr. 2018 Though subway officials have attributed delays to antiquated signals, faulty equipment near the Bergen Street station on the F and G lines is proving that even newer hardware can break down. Jonathan Wolfe, New York Times, "New York Today: Living on Bitcoin," 16 Apr. 2018 America’s favorite dad, Jack Pearson, was cruelly taken from us because of a faulty slow cooker. Blake Bakkila, Health.com, "These ‘This Is Us’-Inspired Slow Cooker Decals Are the Kitchen Accessories You Never Knew You Needed," 1 Mar. 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

12 Oct 2018

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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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 reject or criticize sharply

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