blackletter lawglossary / BLACKLETTER LAW blackletter law. One or more legal principles that are old, fundamental, and well settled. • The term refers to the law printed in books set in Gothic type, which is very bold and black. — Also termed hornbook law. 词条贡献者 译者晓琳,法学硕士(国际争议解决方向),擅长翻译各种与复杂跨境争议相关的法律文件。