basement courtglossary / basement court basement court. Slang. A low-level court of limited jurisdiction, such as a police court, traffic court, municipal court, or small-claims court. 词条贡献者 译员黎川,在一家顶尖澳洲律师事务所的上海办公室担任全职法律翻译,擅长翻译涉及工业与制造业领域的法律文件。