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defective

adjective

  1. having a defect or defects; imperfect; faulty
  2. Gram. lacking some of the usual forms of inflection: “ought” is a defective verb
  3. having a physical or mental defect; subnormal

noun

  1. ☆ a person with some physical or mental defect
  2. Gram. a defective word

Related Forms:

See defective in American Heritage Dictionary 4

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