from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A rhumb line.
- n. One of the points of the mariner's compass.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A line which crosses successive meridians at a constant angle
- n. One of the 32 points of the compass (compass points)
- n. A unit of angular measure equal to 1/32nd of a circle or 11.25°
from the GNU version of the Collaborative International Dictionary of English
- n. A line which crosses successive meridians at a constant angle; -- called also rhumb line, and loxodromic curve. See loxodromic.
from The Century Dictionary and Cyclopedia
- n. A vertical circle of the celestial sphere.
- n. A point of the compass, a thirty-second part of the circle of the horizon, 11° 15' in azimuth.
- n. The course of a ship constantly moving at the same angle to its meridian; a rhumb-line.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a line on a sphere that cuts all meridians at the same angle; the path taken by a ship or plane that maintains a constant compass direction
Possibly from Spanish or Portuguese rumbo, course, direction, ultimately from Latin rhombus, rhombus; see rhombus.(American Heritage® Dictionary of the English Language, Fourth Edition)