Black's Law Dictionary is a comprehensive legal dictionary widely used in the United States. First published in 1891, it provides definitions for legal terms, phrases, and concepts, making it an essential resource for law students, legal professionals, and anyone interested in understanding the law. The dictionary includes not only definitions but also explanations of legal principles and case law references. It is regularly updated to reflect changes in the law and legal terminology, ensuring that users have access to the most current information available in the field of law.