adultery > define

noun

• Extramarital sex that willfully and maliciously interferes with marriage relations.
  • usage: "adultery is often cited as grounds for divorce"
  • synonyms: criminal conversation, fornication

• (n.) Adulteration; corruption.
• (n.) Lewdness or unchastity of thought as well as act, as forbidden by the seventh commandment.
• (n.) The fine and penalty imposed for the offense of adultery.
• (n.) Injury; degradation; ruin.
• (n.) The unfaithfulness of a married person to the marriage bed; sexual intercourse by a married man with another than his wife or voluntary sexual intercourse by a married woman with another than her husband.
• (n.) Faithlessness in religion.
• (n.) The intrusion of a person into a bishopric during the life of the bishop.