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Defective vs Impair - What's the difference?

defective | impair |

As adjectives the difference between defective and impair

is that defective is while impair is (obsolete) not fit or appropriate.

As a verb impair is

to weaken; to affect negatively; to have a diminishing effect on.

defective

English

Adjective

(en adjective)
  • Having one or more defects.
  • * {{quote-magazine, date=2013-03
  • , author= , title=The Smallest Cell , volume=101, issue=2, page=83 , magazine= citation , passage=It is likely that the long evolutionary trajectory of Mycoplasma went from a reductive autotroph to oxidative heterotroph to a cell-wall–defective degenerate parasite. This evolutionary trajectory assumes the simplicity to complexity route of biogenesis, a point of view that is not universally accepted.}}
  • lacking some forms; e.g., having only one tense or being usable only in the third person.
  • Usage notes

    * Nouns to which "defective" is often applied: merchandise, goods, part, component, product, equipment, gene, unit, construction, design, drug, memory, wiring, machine, device, instrument, hardware, software, vehicle.

    Synonyms

    * faulty

    Noun

    (en noun)
  • A person considered to be defective.
  • * {{quote-news, year=2007, date=January 15, author=Bernard E. Harcourt, title=The Mentally Ill, Behind Bars, work=New York Times citation
  • , passage=There were many more kinds of mental institutions at mid-century, ones for “mental defectives and epileptics” and the mentally retarded, psychiatric wards in veterans hospitals, as well as “psychopathic” and private mental hospitals. }}

    See also

    *

    impair

    English

    Alternative forms

    * (l) (qualifier)

    Verb

    (en verb)
  • To weaken; to affect negatively; to have a diminishing effect on.
  • (archaic) To grow worse; to deteriorate.
  • (Milton)

    Derived terms

    * (l)

    Adjective

    (en adjective)
  • (obsolete) Not fit or appropriate.