contour line definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
a line on a map or chart connecting all points of the same elevation (or depth) in a particular area
contour line definition by American Heritage Dictionary
nounThe American Heritage® Dictionary of the English Language, 4th edition Copyright © 2010 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
A line on a map that joins points of equal elevation.
contour line - Science Definition
A line on a map joining points of equal elevation above a given level, usually mean sea level. ♦ The change in elevation between one contour line and the next is the contour interval.
Closely spaced contour lines on the right indicate a steeper grade than the more loosely spaced lines on the left.