Русско-англо-русский юридический словарь

Legal advice is the giving of a professional or formal opinion regarding the substance or procedure of the law in relation to a particular factual situation. (Wikipedia)

A law firm is a business entity formed by one or more lawyers to engage in the practice of law. The primary service rendered by a law firm is to advise clients (individuals or corporations) about their legal rights and responsibilities, and to represent clients in civil or criminal cases, business transactions, and other matters in which legal advice and other assistance are sought. (Wikipedia)

In Britain, a solicitor is a lawyer who gives legal advice to clients, prepares legal documents and cases, and in certain limited circumstances may represent a client in court. (Collins COBUILD English Usage)

In its most general sense, the practice of law involves giving legal advice to clients, drafting legal documents for clients, and representing clients in legal negotiations and court proceedings such as lawsuits, and is applied to the professional services of a lawyer or attorney at law, barrister, solicitor, or civil law notary. (Wikipedia)