undulation — English Dictionary

Noun

1. An instance or act of undulating.

   Usage

   • Countable
   • Uncountable

   Examples

   But the next undulation would raise us, showing the island ablaze in the sunlight, an emerald of dazzling beauty resting lightly on the bosom of the sea.

2. A wavy appearance or outline; waviness.

   Usage

   • Countable
   • Uncountable

3. A tremulous tone produced by a peculiar pressure of the finger on a string.

   Usage

   • Countable
   • Uncountable

4. A wavelike curve; a smooth and regular rise and fall.

   Usage

   • Countable
   • Uncountable

5. A wavelike motion of the air; electromagnetic radiation.

   Usage

   • Countable
   • Uncountable

6. A feeling as if of an undulatory motion about the heart.

   Usage

   • Countable
   • Dated
   • Uncountable

7. The distinctive motion of the matter within an abscess on being pressed when it is ripe for opening.

   Usage

   • Countable
   • Dated
   • Uncountable

Noun

1. an undulating curve

   Synonyms

   wave

   Broader terms

   curvecurved shape

2. wavelike motion; a gentle rising and falling in the manner of waves

   Broader terms

   movementmotion

3. (physics) a movement up and down or back and forth

   Synonyms

   wave

   Broader terms

   movementmotion