Русско-англо-русский юридический словарь

Treason is criminal disloyalty. Historically, in common law countries, high treason is treason against the state. It was differentiated from petty treason (or petit treason), which was treason against a lesser lawful superior (such as a servant killing his master). (Wikipedia)

Grand theft is contrasted with petty theft, also called petit theft, that is of smaller magnitude or lesser seriousness. (Wikipedia)

The more powerless a petty official felt, the more he wielded what little power he had. (Prospect)

A misdemeanor (American English, spelled misdemeanour elsewhere) refers to a low-level criminal act or violation of law in various countries around the world, particularly in the United States. Misdemeanors are generally punished less severely than felonies, but theoretically more so than administrative infractions (also known as minor, petty, or summary offences) and regulatory offences. Misdemeanor convictions typically result in small monetary fines, community service, or less than a year of imprisonment. (Wikipedia)