FAULTY Synonyms: 37 Similar and Opposite Words

faulty

adjective

ˈfȯl-tē

Definition of faulty next

as in defective

having a fault the cause of the plane crash was traced to faulty wiring

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Example Sentences

Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.

Recent Examples of faulty Investigators found that a flight-control system repeatedly forced the nose of the then-new planes downward based on faulty readings from a single sensor, and pilots in both crashes were unable to regain control. —

Rio Yamat, Fortune, 15 May 2026 Released in early January, medical experts decried the schedule as bypassing the government’s typical process for recommending vaccines and argued the effort was built on faulty assumptions. —

Rachel Roubein, Washington Post, 15 May 2026 But not all faulty information online is being spread in bad faith. —

Allison Parshall, Scientific American, 15 May 2026 But design flaws, component defects and faulty installation can cause a rooftop solar system to start a fire. —

Jason Rantala, CBS News, 13 May 2026 See All Example Sentences for faulty

Recent Examples of Synonyms for faulty

defective

Adjective

That six-story building has had 117 open violations, which include defective self-closing doors on the fourth and sixth floors and nonfunctioning smoke detectors and carbon monoxide detectors, city records show.

— Emma Seiwell, New York Daily News, 14 May 2026
The Federal Trade Commission’s Mail, Internet, or Telephone Order Merchandise Rule requires sellers to deliver merchandise as promised or issue a prompt refund when a product is defective or undelivered.

— Christopher Elliott, Mercury News, 8 May 2026