Irish Law This was the first, and remains the best, dictionary of Irish law. It defines the principal words, concepts and phrases, their legal source, whether statutory or judicial, and gives a brief introduction to the law. Now in its 4th edition and with its definitions having been cited in the Supreme Court, this book remains essential to the understanding and practice of the law. Extensively cross-referenced to the relevant articles and books which can be consulted for further information, this book examines every area of Irish law thoroughly.