faulty

adjective

ˈfȯl-tē 

faultier; faultiest

: marked by fault or defect : imperfect

faultily

ˈfȯl-tə-lē 

adverb

faultiness

ˈfȯl-tē-nəs 

noun

Synonyms of faulty

• defective

Examples of faulty in a Sentence

the cause of the plane crash was traced to faulty wiring

Recent Examples on the Web

What To Check Before Trusting An AI Answer A few quick checks can catch most of these gaps before a decision gets made on faulty information. — Vaidotas Juknys, Forbes.com, 4 Aug. 2026

Burning for a fifth day, the blaze outside Athens prompted the evacuation of more than 1,000 people and was blamed on a faulty power line from a wind farm. — ABC News, 4 Aug. 2026

The blaze was blamed on a faulty power line from a wind farm and led to the arrests of two contractors on charges of negligent arson. — Derek Gatopoulos, Los Angeles Times, 3 Aug. 2026

However, research is beginning to show that that assumption is faulty. — Yigit Topoglu, The Conversation, 3 Aug. 2026

Word History

First Known Use

14th century, in the meaning defined above

Rhymes for faulty

• salty

Kids Definition

faulty

adjective

ˈfȯl-tē 

faultier; faultiest

: having a fault or weakness : imperfect

faultily

-tə-lē 

adverb

faultiness

-tē-nəs 

noun