1. a person who is very comfortable and skilled in or around water
Usage: informal
2. any of various aquatic salamanders, especially the mudpuppy
Usage: zoology
3. a dog trained to retrieve waterfowl or work in water

Examples

• As a former lifeguard, Jake was a real waterdog who could swim for hours.
• The children called their swimming instructor a waterdog because she never seemed to tire in the pool.
• We found a waterdog salamander under a rock in the creek.
• The mudpuppy is a type of waterdog that retains its gills throughout life.
• The hunter’s waterdog retrieved the duck from the marsh.
• Labrador retrievers make excellent waterdogs for duck hunting.
• The waterdog paddled through the reeds to fetch the fallen bird.