arm in armglossary / ARM-IN-ARM arm-in-arm, adj. Of, relating to, or involving a transaction between parties whose personal interests are involved. Cf. ARM’S-LENGTH. 词条贡献者 法律翻译Johnny,毕业于新加坡知名法学院,专注翻译各类与劳动、雇佣和福利有关的法律文件。