An act of violating rules, laws, or agreements; an offense or breach (commonly used in the form 'to violate ~').
会社の規則に違反した社員には処分が下された。
An employee who violated the company's rules was disciplined.
交通違反は罰金の対象になる。
Traffic violations are subject to fines.
この行為は契約違反に当たると判断された。
This act was judged to constitute a breach of contract.