Wordnet 3.0
ADJECTIVE (1)
1. 
 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):
extramarital
    adj 1: characterized by adultery; "an adulterous relationship";
           "extramarital affairs"; "the extracurricular activities
           of a philandering husband" [syn: adulterous,
           extramarital, extracurricular]