1. Stir up (water) so as to form ripples
   - ripple, ruffle, riffle, cockle 
2. Occur in soft rounded shapes
   - roll 
3. Move in a wavy pattern or with a rising and falling motion
   "The curtains undulated"
   - roll, flap, wave 
4. Increase and decrease in volume or pitch, as if in waves
   "The singer's voice undulated"

1. Having a wavy margin and rippled surface

Derived forms: undulated, undulates, undulating

See also: smooth, undulation

Type of: change, flow, flux, move

Encyclopedia: Undulate

• Ellas
• Ellen Price Wood
• Elli
• Ellice Islands
• Ellington
• Elliott's goldenrod
• ellipse
• ellipsis
• ellipsoid
• ellipsoid of revolution
• ellipsoidal
• elliptic
• elliptic geometry
• elliptic leaf
• elliptical
• elliptically
• ellipticity
• Ellis Island
• Ellison
• Ellsworth
• Ellul
• elm
• elm family
• elm tree
• Elmer Ambrose Sperry