SG Heritage Dictionary

Portgrave [\N] Webster's Dictionary 1828

1. PORTGRAVE

3. PORTICO, noun [Latin porticus, form porta or portus.] In architecture, a kind of gallery on the ground, or a piazza encompassed with arches supported by columns; a covered walk. The roof is sometimes flat; sometimes vaulted.

Portgrave Webster's Dictionary 1913

In old English law, the chief magistrate of a port or maritime town.; a portreeve.