n. One who cruises or scours the ocean with an armed vessel, without a commission from any sovereign or state, seizing and plundering merchant vessels, or making booty on land; a pirate; a freebooter.n. A piratical vessel; sometimes, a privateer.n. A scorpænoid fish, Sebastichthys rosaceus, with smooth cranial ridges, moderate-sized scales, and pale blotches surrounded by purplish shades on the sides.n. Any pirate-bug of the family Reduriidæ.