adultery
Definitions
Voluntary sexual intercourse between a married person and someone other than their spouse.
Disloyalty or unfaithfulness to a spouse.
Examples
The scandal was fueled by rumors of adultery involving several high-profile public figures.
In many historical legal codes, adultery was considered a serious offense that could lead to severe social consequences.
Synonyms
infidelity extramarital affair cheating unfaithfulness cuckoldry