A polygon with eight sides and eight angles.
Often in the form Octagon: the arena for mixed martial arts.
A tool used in peat cutting or for marking off ground.
A type of plough used by lumberjacks to carve a track for a sleigh.
A horseman or cavalryman, especially a German one, associated with the wars of the 16th and 17th centuries.
A set of instructions for navigating a course at sea; a pilot's book or seaman's guide.
The penis.