Portgreve \Port"greve`\, Portgrave \Port"grave`\, [AS. portger[=e]fa; port a harbor + ger[=e]fa a reeve or sheriff. See {Reeve} a steward, and cf. {Portreeve}.] In old English law, the chief magistrate of a port or maritime town.; a portreeve. [Obs.] --Fabyan.