proper name · a person's age or year of birth, frequently used in formal or polite inquiries

请问老先生贵庚？

noun · the seventh of the ten Heavenly Stems, used to denote the seventh item in a sequence (equivalent to G or VII) or the prefix hepta-

请把这组新到的档案归入庚号文件夹。

noun · a direction on the traditional Chinese compass representing 255 degrees

在古代罗盘上，庚位指向西方偏南。