1. On the waterfront of a port: taking a stroll portside; a portside restaurant.
2. Nautical. On the port side of a ship or boat: skirting a lighthouse portside; the portside oar.

The American Heritage® Dictionary of the English Language, Fourth Edition Copyright © 2007, 2000 by Houghton Mifflin Company. Updated in 2009. Published by Houghton Mifflin Company. All rights reserved.