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.

Roo's bottle of drops was matched to one of two faulty batches of Aactive D3 supplements from TriOn Pharma, which were distributed across the UK.

From BBC • Apr. 16, 2026

But they insisted that the platforms themselves negligently enabled this harm through faulty design of their services.

From Slate • Mar. 30, 2026

It again ties back to this faulty idea that there isn’t much return on investment for AI compute.

From Barron's • Mar. 27, 2026

In 2024, nearly 4,000 vehicles were recalled for a faulty accelerator pedal that could become dislodged and stuck.

From Los Angeles Times • Mar. 19, 2026

John Joly, also of Trinity, decided to give Edmond Halley’s ocean salts idea a whirl, but his method was based on so many faulty assumptions that he was hopelessly adrift.

From "A Short History of Nearly Everything" by Bill Bryson

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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