1. an experienced sailor
Usage: informal
2. a seal
Usage: informal

Examples

• The old seadog had sailed the seven seas for forty years.
• Captain Murphy was a weathered seadog who knew every port from here to Singapore.
• The grizzled seadog told tales of storms and adventures.
• We watched the seadogs basking on the rocky shore.
• A curious seadog poked its head above the water near our boat.
• The harbor seals, or seadogs as the locals called them, were a common sight.