Definition of undulate:
rove, prance, dither, shuffle, sinuate, beckon, drift, vagabond, riff, rumple, billow, roll, strut, sashay, wrap, riffle, swerve, bubble, vary, roll out, seethe, hustle, tramp, pucker, slither, range, turn over, roll up, mix, revolve, waver, swing, flap, straight, mess up, pother, curve, brandish, babble, hesitate, flourish, smooth, wheel, veer, guggle, flip, thumb, leaf, ripple, ruffle up, wander, cast, swan, pleat, tittup, flick, knit, ramble, swagger, curl, move, wave, pluck, burble, cock, wind, cockle, snake, stray, twine, crumple, ruffle, fluff, roam, gurgle.
- "Paul Patoff", F. Marion Crawford.
When I made my first attempt to reach the parlour I was so weak, that, at every step, I felt as if I should pitch forward to the ground, which seemed to undulate beneath my feet like the floor of a cabin in a storm at sea.- "Roughing it in the Bush", Susanna Moodie.
- "Caribbee", Thomas Hoover.