B2 [C or U] a strong pattern of sounds, words, or musical notes that is used in music, poetry, and dancing: He beat out a jazz rhythm on the drums. I've got no sense of rhythm, so I'm a terrible dancer.Technical music terms B2 [C or U] a regular movement or pattern of movements: She was lulled to sleep by the gentle rhythm of the boat in the water. She hit the ball so hard that her opponent had no chance to establish any rhythm in her game.Straight, even and level › [C] a regular pattern of change, especially one that happens in nature: the rhythm of the seasons Breathing and sleeping are examples of biological rhythms in humans.Change and changes