1. (noun)defect an imperfection in a bodily system Synonyms: shortcoming, mar, fault, blemish, flaw
2. (noun)defect, shortcoming a failing or deficiency Synonyms: shortcoming, mar, fault, blemish, defect, flaw
3. (noun)defect, fault, flaw an imperfection in an object or machine Synonyms: blemish, mar, shift, faulting, mistake, defect, fault, demerit, shortcoming, break, flaw, fracture, geological fault, error
4. (verb)blemish, defect, mar a mark or flaw that spoils the appearance of something (especially on a person's body) Synonyms: blemish, mar, flaw, fault, defect, shortcoming
5. (verb)defect, desert desert (a cause, a country or an army), often in order to join the opposing cause, country, or army Synonyms: desert, forsake, desolate, defect, abandon
Synonyms, Thesaurus & Antonyms of 'defect'
English Synonyms and Antonyms
1. defect Whatever mars the beauty or completeness of an object is a blemish, whether original, as squinting eyes, or the result of accident or disease, etc., as the pits of smallpox. A blemish is superfic Synonyms: blemish, blot, defacement, disgrace, injury, spot, blur, defect, dishonor, reproach, stain, brand, deformity, fault, smirch, stigma, crack, dent, flaw, soil, taint, daub, disfigurement, imperfection, speck, tarnish
Synonyms for defect 
