- on a waterfront or near a port.
- Nautical. on the port side of a vessel.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for portside
Instead he ran the other way, through the portside door of the library.Brigands of the Moon
The note was addressed to one Captain Harris, at a tavern on the portside.The Master of Ballantrae
Robert Louis Stevenson
In every round little window gleamed a face,—for a moment only along the portside.West Wind Drift
George Barr McCutcheon