1. billow, undulation, swell, surge (of a sea or lake). 2. shaking; beating; whipping; churning. 3. something that has been shaken, beaten, whipped, or churned. 4. chaff (left after grain has been sieved). 5. pulsation, vibration (of an emotion). 6. turmoil, disturbance, agitation. 7. wiggling (of a woman´s hips, a belly dancer´s stomach).