A robber on the high seas; one who by open violence takes
the property of another on the high seas; especially, one who makes it
his business to cruise for robbery or plunder; a freebooter on the
seas; also, one who steals in a harbor.

An armed ship or vessel which sails without a legal
commission, for the purpose of plundering other vessels on the high
seas.

One who infringes the law of copyright, or publishes the
work of an author without permission.

To play the pirate; to practice robbery on the high
seas.

To publish, as books or writings, without the permission
of the author.