Definition of Rhythm

• the arrangement of spoken words alternating stressed and unstressed elements; "the rhythm of Frosts poetry"
• natural family planning in which ovulation is assumed to occur 14 days before the onset of a period (the fertile period would be assumed to extend from day 10 through day 18 of her cycle)
• the basic rhythmic unit in a piece of music; "the piece has a fast rhythm"; "the conductor set the beat"