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Webster 1913 Edition

Adj.

Having a ridge or ridges; rising in a ridge.

“Lifted on a ridgy wave.”

Pope.

Adj.

Having a ridge or ridges; rising in a ridge.

ridgy ‎(comparative ridgier, superlative ridgiest)

Rising in a ridge or ridges.
Having ridges; ridged.
The land around here is very ridgy so we get too little sun between ridges and too much wind at the tops.