cycle
[sahy-kuh l]

noun
1.any complete round or series of occurrences that repeats or is repeated.

2. a round of years or a recurring period of time, especially one in which certain events or phenomena repeat themselves in the same order and at the same intervals.

3. any long period of years; age.

4. a bicycle, motorcycle, tricycle, etc.

5. a group of poems, dramas, prose narratives, songs etc., about a central theme, figure, or the like: the Arthurian cycle.

6. Physics .
     a. a sequence of changing states that, upon completion, produces a final state identical to the original one.
     b. one of a succession of periodically recurring events.
     c. a complete alteration in which a phenomenon attains a maximum and minimum value, returning to a final value equal to the original one.

7. Mathematics . a permutation of a set of elements that leaves the original cyclic order of the elements unchanged.

8. Computers .
     a. the smallest interval of time required to complete an operation in a computer.
     b. a series of computer operations repeated as a unit.

verb (used without object)
9. to ride or travel by bicycle , motorcycle , tricycle ,   etc.

10. to move or revolve in cycles; pass through cycles.

Idiom
11. hit for the cycle, Baseball . (of one player) to hit a single, double, triple, and home run in one game.