Definitions

faulty

[fawl-tee] / ˈfɔl ti /

ADJECTIVE

not working; incorrect

Synonyms

STRONGEST

broken cracked damaged defective deficient erroneous false flawed imprecise inaccurate inadequate incomplete insufficient invalid leaky malfunctioning unreliable

WEAK

adulterated amiss awry bad below par blamable blemished botched debased distorted fallacious fallible frail impaired imperfect inexact injured lame lemon maimed malformed marred out of order rank sick tainted unfit unretentive unsound warped weak wrong

Antonyms

STRONGEST

OK accurate adequate ample complete correct enough faultless fixed flawless honest perfect reliable right sufficient true unbroken valid working

WEAK

sound strong

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.

Whether the plumber directly caused the problem, failed to identify an underlying issue, or repaired one faulty component only for another to reveal itself, the result is the same: the cistern does not function properly.

From MarketWatch • Jun. 10, 2026

Project opponents also filed multiple lawsuits seeking to kill the project, alleging faulty environmental reviews and improper city approval.

From Los Angeles Times • Jun. 9, 2026

Nintendo promised in 2023 that it would repair or replace faulty controllers without cost, even if no longer covered by warranty.

From Barron's • Jun. 8, 2026

Vehicles, when they encounter mechanical problems such as faulty wiring or an air leak, can now beam that information to the owners app and to the dealer.

From The Wall Street Journal • Jun. 6, 2026

“And speaking of hitherto unsuspected skills, Ronald,” said George, “what is this we hear from Ginny about you and a young lady called — unless our information is faulty — Lavender Brown?”

From "Harry Potter and the Half-Blood Prince" by J.K. Rowling

Vocabulary lists containing faulty

Fake It 'Til You Make It: Synonyms for "False"

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Drama

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Way Off: Synonyms for "Wrong"

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