- a sailor, especially an old or experienced one.
- harbor seal.
- a dogfish.
- a pirate or privateer.
Origin of sea dog
First recorded in 1590–1600
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for sea-dog
Brave, courageous Venetian sea-dog, you are just in the nick of time!Famous Privateersmen and Adventurers of the Sea
Charles H. L. Johnston
“Not a bit of it,” said the skipper bluntly, in sea-dog fashion.Fritz and Eric
John Conroy Hutcheson
I am in no one's way, and that sea-dog could do his work as well with me here as without me.Lord Montagu's Page
G. P. R. James
The Californian sea-elephant and the sea-dog of the West Indies have shared a like fate.My Native Land
The gait of the man would have proclaimed him a sea-dog, to any one acquainted with that animal, as far as he could be seen.Jack Tier or The Florida Reef
James Fenimore Cooper
- an experienced or old sailor
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Word Origin and History for sea-dog
Online Etymology Dictionary, © 2010 Douglas Harper