What is the meaning of Adultery?

Sexual intercourse by a married person with someone other than their spouse. See more synonyms at Thesaurus:cuckoldry

Lewdness or unchastity of thought as well as act, as forbidden by the sixth/seventh commandment; sinful sexual behavior as a category.

Faithlessness in religion.

The fine and penalty formerly imposed for the offence of adultery.

The intrusion of a person into a bishopric during the life of the bishop.

Adulteration; corruption.

Injury; degradation; ruin.

Source: wiktionary.org