[ rʌm ]
■ noun Nautical
1》 (also ~ line ) an imaginary line on the earth's surface cutting all meridians at the same angle, used to plot a ship's course on a chart.
2》 any of the thirty-two points of the compass.
Origin
C16: from Fr. rumb (earlier ryn (de vent) 'point of the compass'); assoc. with L. rhombus (see rhombus ).