The Collaborative International Dictionary
Portgreve
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.
Wiktionary
portgreve
alt. (context obsolete UK English) The chief magistrate of a port or maritime town; a portreeve. n. (context obsolete UK English) The chief magistrate of a port or maritime town; a portreeve.