The Collaborative International Dictionary
Sea robber
Sea robber \Sea" rob"ber\ A pirate; a sea rover.
WordNet
Usage examples of "sea robber".
True, the combined weights of guns, carriages, powder, shot, and accessories lessened somewhat the weight of lading that the vessel might transport, but they also served the purpose of making it a bit more likely that ship, company, and reduced amount of goods would reach the point of intended destination rather than going to add to the ill-gotten riches of some sea robber.