Dictionary.com
Thesaurus.com
Synonyms

defect

American  
[dee-fekt, dih-fekt, dih-fekt] / ˈdi fɛkt, dɪˈfɛkt, dɪˈfɛkt /

noun

  1. a shortcoming, fault, or imperfection: a defect in a machine.

    a defect in an argument;

    a defect in a machine.

  2. lack or want, especially of something essential to perfection or completeness; deficiency: a defect of action.

    a defect of common sense

    a defect of action.

  3. Also called lattice defect.  Also called crystal defect,Crystallography. a discontinuity in the lattice of a crystal caused by missing or extra atoms or ions, or by dislocations.


verb (used without object)

  1. to desert a cause, country, etc., especially in order to adopt another (often followed by from orto ).

    He defected from the U.S.S.R. to the West.

defect British  

noun

  1. a lack of something necessary for completeness or perfection; shortcoming; deficiency

  2. an imperfection, failing, or blemish

  3. crystallog a local deviation from regularity in the crystal lattice of a solid See also point defect dislocation

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

verb

  1. (intr) to desert one's country, cause, allegiance, etc, esp in order to join the opposing forces

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Related Words

Defect, blemish, flaw refer to faults that detract from perfection. Defect is the general word for any kind of shortcoming or imperfection, whether literal or figurative: a defect in eyesight, in a plan. A blemish is usually a defect on a surface, which mars the appearance: a blemish on her cheek. Flaw is applied to a defect in quality, caused by imperfect structure (as in a diamond) or brought about during manufacture (as in texture of cloth, in clearness of glass, etc.).

Other Word Forms

  • defectibility noun
  • defectible adjective
  • defectless adjective
  • defector noun
  • nondefecting adjective
  • predefect noun
  • redefect verb (used without object)

Etymology

Origin of defect

First recorded in 1375–1425; late Middle English, from Latin dēfectus “failure, weakness,” equivalent to dēfec-, variant stem of dēficere “to run short, fail, weaken” ( deficient ) + -tus suffix of verb action

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Graham Simpson, who defected from the Scottish Conservatives to Reform UK, backed his party leader, saying he had not seen the joke, adding: "I don't want to see it."

From BBC

PDD had previously cautioned that its financial performance could fluctuate as it strengthens its e-commerce ecosystem and rolls out more support initiatives to keep merchants from defecting to other platforms.

From The Wall Street Journal

He appeared on stage with Michael Holt, the conservative group leader on Babergh council, who announced he had defected to Reform.

From BBC

The health board said the proposal was "necessary" after ongoing defects disrupted the running of the adult bone marrow transplant unit.

From BBC

In a recall filing Friday, Hyundai said it learned March 9 of a fatality potentially involving the defect in an Ohio incident.

From The Wall Street Journal