rhythm
noun [U, C] 1 a strong regular repeated pattern of sounds or movements: to dance to the rhythm of the music music with a fast / slow / steady rhythm jazz rhythms He can't seem to play in rhythm. The boat rocked up and down in rhythm with the sea. the rhythm of her breathing abnormal heart rhythms a dancer with a natural sense of rhythm ( the ability to move in time to a fixed beat) 2 a regular pattern of changes or events: the rhythm of the seasons / tides biological / body rhythms Lack of sleep can upset your daily rhythm. see also BIORHYTHM