noun de·fect \ˈdē-ˌfekt, di-ˈ\

: a physical problem that causes something to be less valuable, effective, healthy, etc.

: something that causes weakness or failure

Full Definition of DEFECT

a :  an imperfection that impairs worth or utility :  shortcoming <the grave defects in our foreign policy>
b :  an imperfection (as a vacancy or an unlike atom) in a crystal lattice
[Latin defectus] :  a lack of something necessary for completeness, adequacy, or perfection :  deficiency <a hearing defect>

Examples of DEFECT

  1. They examine their products for defects.
  2. She was born with a heart defect.
  3. Vanity and pride were his two worst character defects.

Origin of DEFECT

Middle English, from Latin defectus lack, from deficere to desert, fail, from de- + facere to do — more at do
First Known Use: 15th century


verb de·fect \di-ˈfekt\

: to leave a country, political party, organization, etc., and go to a different one that is a competitor or an enemy

Full Definition of DEFECT

intransitive verb
:  to forsake one cause, party, or nation for another often because of a change in ideology
:  to leave one situation (as a job) often to go over to a rival <the reporter defected to another network>
de·fec·tor \-ˈfek-tər\ noun

Examples of DEFECT

  1. The Russian scholar defected in 1979.
  2. She defected from the conservative party.
  3. He defected to the West before the war began.
  4. The reporter defected to another TV network.

Origin of DEFECT

Latin defectus, past participle of deficere
First Known Use: 1596


noun de·fect \ˈdē-ˌfekt, di-ˈ\   (Medical Dictionary)

Medical Definition of DEFECT

:  a lack or deficiency of something necessary for adequacy in form or function <a hearing defect>


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