definition of
rhythm

[1] #1 rhythm n. [beat, musical rhythm] the basic rhythmic unit in a piece of music; "the piece has a fast rhythm"; "the conductor set the beat". wn

[2] #2 rhythm n. [regular recurrence] recurring at regular intervals. wn

[3] #3 rhythm n. [cycle, round] an interval during which a recurring sequence of events occurs; "the never-ending cycle of the seasons". wn

[4] #4 rhythm n. [speech rhythm] the arrangement of spoken words alternating stressed and unstressed elements; "the rhythm of Frost's poetry". wn

[5] #5 rhythm n. [rhythm method of birth control, rhythm method, calendar method of birth control, calendar method] 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). wn