copyleftglossary / COPYLEFT copyleft. Slang. A software license that allows users to modify or incorporate open-source code into larger pro-grams on the condition that the software containing the source code is publicly distributed without restrictions. 词条贡献者 法律翻译大智,毕业于世界顶级翻译学院,专注翻译各类与税务、财富规划服务和高管薪酬有关的法律文件。