defect

/ˈdiːfɛkt/
noun
  1. A fault, imperfection, or flaw in something or someone.
    • A small defect in the bridge's support beam was discovered during the inspection.
    • Her only defect is that she is sometimes too honest.
    • The new phone had a defect in the screen that caused a dark spot.
Antonyms
verb
  1. To leave one's country, political party, or group to join an opposing one.
    • During the war, a few soldiers defected and crossed the border.
    • Several members of the party defected to form a new coalition.
    • The spy decided to defect to the other side after years of doubt.
Synonyms
Antonyms
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