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.

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

From Slate • Mar. 30, 2026

It questioned whether old or faulty target analysis could have led to the school building being hit.

From BBC • Mar. 27, 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

What will happen to faulty or degraded EV batteries?

From The Wall Street Journal • Mar. 18, 2026

There’s a faulty signal on this line, about halfway through my journey.

From "The Girl on the Train" by Paula Hawkins

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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