Definition of ridgeline in US English:

ridgeline

noun

  • 1The line described by the crest of an elongated raised band or strip on the surface of something, especially the crest of a chain of hills or mountains.

  • 2The line of the ridge of a roof.

Origin

Late 17th century; earliest use found in Nehemiah Grew (a1641–1712), botanist and physician. From ridge + line.

Pronunciation

ridgeline

/ˈrɪdʒlʌɪn/