an imaginary circle or orbit in the heavens; one of the celestial spheres.-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.-an age; a long period of time.-an orderly list for a given time; a calendar.-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.-one entire round in a circle or a spire; as, a cycle or set of leaves.-a bicycle or tricycle, or other light velocipede.-to pass through a cycle of changes; to recur in cycles.-to ride a bicycle, tricycle, or other form of cycle.