Русско-англо-русский юридический словарь

Adultery (anglicised from Latin adulterium) is extramarital sex that is considered objectionable on social, religious, moral or legal grounds. Though what sexual activities constitute adultery varies, as well as the social, religious and legal consequences, the concept exists in many cultures and is similar in Islam, Christianity and Judaism. (Wikipedia)

Throughout the UK there is one legal ground for divorce: the "irretrievable breakdown" of a marriage. (BBC News)

What's more, according to Russia's Subsoil Law, there are no legal grounds for prohibiting people from collecting, selling and exporting meteorite fragments. (BBC)