Definitions of cycle:

• noun:   a single complete execution of a periodically repeated phenomenon

  Example: "A year constitutes a cycle of the seasons"

• noun:   a periodically repeated sequence of events

  Example: "A cycle of reprisal and retaliation"

• noun:   a series of poems or songs on the same theme

  Example: "Schubert's song cycles"

• noun:   an interval during which a recurring sequence of events occurs

  Example: "The neverending cycle of the seasons"

• noun:   a wheeled vehicle that has two wheels and is moved by foot pedals
• noun:   the unit of frequency; one Hertz has a periodic interval of one second
• verb:   pass through a cycle

  Example: "This machine automatically cycles"

• verb:   cause to go through a recurring sequence

  Example: "Cycle thge laundry in this washing program"

• verb:   recur in repeating sequences
• verb:   ride a bicycle
• verb:   ride a motorcycle