|1.||a lack of something necessary for completeness or perfection; shortcoming; deficiency|
|2.||an imperfection, failing, or blemish|
|3.||crystallog point defect See also dislocation a local deviation from regularity in the crystal lattice of a solid|
|4.||(intr) to desert one's country, cause, allegiance, etc, esp in order to join the opposing forces|
|[C15: from Latin dēfectus, from dēficere to forsake, fail; see |
defect de·fect (dē'fěkt', dĭ-fěkt')
A lack of or abnormality in something necessary for normal functioning; a deficiency or imperfection.
imperfection in the regular geometrical arrangement of the atoms in a crystalline solid. These imperfections result from deformation of the solid, rapid cooling from high temperature, or high-energy radiation (X-rays or neutrons) striking the solid. Located at single points, along lines, or on whole surfaces in the solid, these defects influence its mechanical, electrical, and optical behaviour.
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