Adjective extracurricular has 3 senses
  1. extracurricular - outside the regular academic curriculum; "sports and drama are popular extracurricular activities"
    Antonym:
    inside (indirect, via outside)
  2. extracurricular - outside the regular duties of your job or profession
    Antonym:
    inside (indirect, via outside)
  3. adulterous, extramarital, extracurricular - characterized by adultery; "an adulterous relationship"; "extramarital affairs"; "the extracurricular activities of a philandering husband"
    Antonym: licit (indirect, via illicit)
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