verb · expert evaluation of the quality, authenticity, or value of an item

这件青铜器经过专家鉴证被确认为真品。

verb · the process of verifying that a document, signature, or identity is genuine or official

提交文件前需要经过有关部门的法律鉴证。

verb · scientific examination and gathering of evidence for criminal or legal purposes

刑事鉴证人员在现场仔细提取了指纹。