notarial actglossary / NOTARIAL ACT notarial act. An official function of a notary public, such as placing a seal on an affidavit. See NOTARY PUBLIC. [Cases: Notaries6. C.J.S. Notaries §§ 11, 15, 17.] 词条贡献者 双语律师Julie,国际知名法学院法律专业,擅长翻译各类与证券监管、合规与执法相关的法律文件。