…was his most perfect idea of heaven’s happiness: mine was rocking in a rustling green tree, with a west wind blowing, and bright white clouds flitting rapidly above; and not only larks, but throstles, and blackbirds, and linnets, and cuckoos pouring out music on every side, and the moors seen at a distance, broken into cool dusky dells; but close by great swells of long grass undulating in waves to the breeze; and woods and sounding water, and the whole world awake and wild with joy.
There are no more uses of "undulate" in the book.
Show samples from other sources
A sidewinding snake uses less energy to cover the same distance as a laterally undulating snake uses.
The dancers’ arms undulated in unison to add to the ethereal effect.