noun ·Rare ·Advanced level

Definitions

Noun

1. 1
   A contour line connecting all points in valley at the same elevation as the keypoint, used in planning efficient water usage.
2. 2
   A boundary line that separates color and monochromatic areas or differently colored areas of print.

Etymology

From key + line.

Related phrases

contour line

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.