1. (n.) An imaginary circle or orbit in the heavens; one of the celestial spheres.

2. (n.) An interval of time in which a certain succession of events or phenomena is completed, and then returns again and again, uniformly and continually in the same order; a periodical space of time marked by the recurrence of something peculiar; as, the cycle of the seasons, or of the year.

3. (n.) An age; a long period of time.

4. (n.) An orderly list for a given time; a calendar.

5. (n.) The circle of subjects connected with the exploits of the hero or heroes of some particular period which have served as a popular theme for poetry, as the legend of Arthur and the knights of the Round Table, and that of Charlemagne and his paladins.

6. (n.) One entire round in a circle or a spire; as, a cycle or set of leaves.

7. (n.) A bicycle or tricycle, or other light velocipede.

8. (v. i.) To pass through a cycle of changes; to recur in cycles.

9. (v. i.) To ride a bicycle, tricycle, or other form of cycle.