only 1 use
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Definition
a smooth wave-like motion (physical or auditory)
or:
having a wavy or rippled form or surface
or:
having a wavy or rippled form or surface
- I had crossed a marshy tract full of willows, bulrushes, and odd, outlandish, swampy trees; and I had now come out upon the skirts of an open piece of undulating, sandy country, about a mile long, dotted with a few pines and a great number of contorted trees, not unlike the oak in growth, but pale in the foliage, like willows.Chapter 14 — The First Blow (3% in)
There are no more uses of "undulate" in Treasure Island.
Typical Usage
(best examples)