IPA: /ˈrɪdʒˌtɒp/
KK: /ˈrɪdʒˌtɑp/
The highest part of a ridge, where the land is flat and elevated.
We stood on the ridgetop and admired the view of the valley below.
Ridgetop is formed from "ridge" (from Old English "hrycg", meaning a raised strip of land) and "top" (from Old English "top", meaning the highest point). The word "ridgetop" refers to the highest point of a ridge.
Picture a raised strip of land ('ridge') that reaches its highest point ('top') — that's what a ridgetop is.