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

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

Investigations have repeatedly pointed to lax inspections, faulty electrical systems and buildings operating beyond their approved use.

From BBC • Jun. 3, 2026

On the other hand, suppose our time traveler had persuaded Queen Isabella that Columbus’ geography was faulty, that from Eratosthenes’ estimate of the circumference of the Earth, Columbus could never reach Asia.

From "Cosmos" by Carl Sagan

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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