cycle

cycle (http://definr.com/cycle)

     n 1: an interval during which a recurring sequence of events
          occurs; "the neverending cycle of the seasons" [syn: rhythm,
           round]
     2: a series of poems or songs on the same theme: "schubert's
        song cycles"
     3: a periodically repeated sequence of events: "a cycle of
        reprisal and retaliation"
     4: the unit of frequency; one Hertz has a periodic interval of
        one second [syn: Hertz, Hz, cycle per second, cycles/second,
         cps]
     5: a single complete execution of a periodically repeated
        phenomenon: "a year constitutes a cycle of the seasons"
     6: a shortened version of `bicycle' or `tricycle' or
        `motorcycle'
     v 1: cause to go through a cycle
     2: pass through a cycle; "This machine automatically cycles"
     3: ride a motorcycle [syn: motorcycle]
     4: ride a bicycle [syn: bicycle, bike, pedal, wheel]
     5: recur in cycles