Definition of defective in English:



  • 1Imperfect or faulty.

    ‘complaints over defective goods’
    • ‘Plato regarded the world of pure mathematical ideas as alone worthy of study; if physical objects did not conform to it, so much the worse for them, because they were defective and imperfect anyway.’
    • ‘The patient said that as a young man he had used the Bates method for improving defective vision.’
    • ‘Careless driving includes using a mobile phone while driving, driving without care or attention or with broken or defective lights.’
    • ‘The study found 35,000 of the district's 50,000 street lights need to be replaced because they are defective or too old - more than 5,000 of them are over 40 years old.’
    • ‘Summonses totalling R416000 have been served on drivers whose vehicles were found to have defects which included smooth tyres, defective brakes and faulty lights.’
    • ‘These problems are associated with defective binocular vision and a comparable difficulty in locating sounds, due to abnormally-arranged nerve pathways from the eyes and inner ears to the brain.’
    • ‘Our service and post-sales support is designed to replace faulty or defective products, and to provide training for the proper operation and configuration of network hardware.’
    • ‘We are talking about corporations which - thanks in part to their own defective strategic vision, in part to circumstances beyond their control - appear to have lost the plot.’
    • ‘Relaxation is one of the treatments for defective vision.’
    • ‘There is some validity in their argument, because if our understanding is inherently imperfect, regulations are bound to be defective.’
    • ‘My idea was to get a bunch of cheap wallets and fill my bag with junk, like defective cameras and broken portable CD players.’
    • ‘During a three-hour check of 59 Hackney carriages and private hire vehicles they found eight had defective tyres, while one had a faulty exhaust.’
    • ‘Hundreds of injuries, and some deaths, were linked to such devices as defective heart valves, faulty pacemakers, and substandard intrauterine devices.’
    • ‘He didn't smoke, and he jogged and worked out and ate right, but he had a defective heart - the wrong number of valves or something.’
    • ‘Weak or defective spaces in the organs or tissues are where a pathological condition is likely to begin.’
    • ‘The legislation, according to its critics, would have provided legal loopholes for those responsible for defective products, faulty construction and even criminal acts.’
    • ‘Apple packing houses currently rely on digital camera imagery to sort apples by surface appearance only, flagging those that are visibly defective or the wrong size or color.’
    • ‘The list of faults included defective tyres, faulty brakes and defective steering.’
    • ‘I think I spent most of my childhood under the impression that I just wasn't trying hard enough, or that perhaps my vision was somehow defective.’
    • ‘Some buses examined by inspectors in the last year have been found to have defective steering, faulty brakes or even bald tyres.’
    faulty, flawed, imperfect, shoddy, inoperative, not working, not functioning, non-functioning, malfunctioning, out of order, unsound
    View synonyms
    1. 1.1 Lacking or deficient.
      ‘dystrophin is commonly defective in muscle tissue’
      • ‘Responses to GIP have been shown to be defective in type 2 diabetic patients.’
      • ‘A case study of cause-and-effect, it's also a yarn of dangerously defective brotherly love.’
      • ‘A genetic selection for mutants that activate this pathway uncovered a class of mutants defective in cell wall integrity.’
      • ‘Mutants that grew on these plates were judged to be defective in glucose metabolism and were not studied further.’
      lacking, wanting, deficient, inadequate, insufficient, short, low, scant
      View synonyms
    2. 1.2Grammar (of a word) not having all the inflections normal for the part of speech.
  • 2dated, offensive Having mental disabilities.


dated, offensive
  • A person with mental disabilities.