noun

1. a recurring period of a definite number of years, used as a measure of time
2. a period of time within which a round of regularly recurring events or phenomena is completed the business cycle
3. a complete set of events or phenomena recurring in the same sequence
4. a very long period of time; an age
5. all of the traditional or legendary poems, songs, etc. connected with a hero or an event the Charlemagne cycle
6. a series of poems or songs on the same theme
7. a bicycle, tricycle, or motorcycle
8. Astron., Archaic the orbit of a celestial body
9. Biol. a recurring series of functional changes or events
10. Elec. one complete period of the reversal of an alternating current from positive to negative and back again

Etymology: ME cicle < LL cyclus < Gr kyklos, a circle, cycle: see wheel

intransitive verb cycled -·cled, cycling -·cling

1. to occur or recur in cycles; pass through a cycle
2. to ride a bicycle, tricycle, or motorcycle