undulation uhn-juh-LAY-shuhn noun WS #41

a smooth rising and falling or side-to-side movement; a gentle curve or wave-like form; a wavelike motion or form; the act of moving with a smooth wavelike motion

1. The undulation of the hills provided a gentle, rolling backdrop for the peaceful rural village.
2. The swimmer's powerful undulation through the water demonstrated perfect technique and form.
3. The undulation of the flag in the wind symbolized the nation's resilience and enduring spirit.
4. The dancer's graceful undulation captivated the audience with its fluid, serpentine movements.
5. The undulation of the wheat field in the breeze created a mesmerizing golden wave across the landscape.