Wordnet 3.0
ADJECTIVE (3)
1. 
 outside the regular academic curriculum; 
- Example: "sports and drama are popular extracurricular activities"2. 
 outside the regular duties of your job or profession; 
3. 
 characterized by adultery; 
- Example: "an adulterous relationship"- Example: "extramarital affairs"- Example: "the extracurricular activities of a philandering husband"[syn: adulterous, extramarital, extracurricular]
WordNet (r) 3.0 (2006):
extracurricular
    adj 1: outside the regular academic curriculum; "sports and
           drama are popular extracurricular activities"
    2: outside the regular duties of your job or profession
    3: characterized by adultery; "an adulterous relationship";
       "extramarital affairs"; "the extracurricular activities of a
       philandering husband" [syn: adulterous, extramarital,
       extracurricular]