cycle

[ sahy-kuhl ]

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.
   1. a sequence of changing states that, upon completion, produces a final state identical to the original one.
   2. one of a succession of periodically recurring events.
   3. 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.
   1. the smallest interval of time required to complete an operation in a computer.
   2. a series of computer operations repeated as a unit.

verb (used without object)

, cy·cled, cy·cling.

1. to ride or travel by bicycle, motorcycle, tricycle, etc.
2. to move or revolve in cycles; pass through cycles.

cycle

/ ˈsaɪkəl /

noun

1. a recurring period of time in which certain events or phenomena occur and reach completion or repeat themselves in a regular sequence
2. a completed series of events that follows or is followed by another series of similar events occurring in the same sequence
3. the time taken or needed for one such series
4. a vast period of time; age; aeon
5. a group of poems or prose narratives forming a continuous story about a central figure or event

   the Arthurian cycle

6. a series of miracle plays

   the Chester cycle

7. a group or sequence of songs See song cycle
8. short for bicycle tricycle motorcycle
9. astronomy the orbit of a celestial body
10. a recurrent series of events or processes in plants and animals

    a growth cycle

    a life cycle

    a metabolic cycle

11. physics a continuous change or a sequence of changes in the state of a system that leads to the restoration of the system to its original state after a finite period of time
12. one of a series of repeated changes in the magnitude of a periodically varying quantity, such as current or voltage
13. computing
    1. a set of operations that can be both treated and repeated as a unit
    2. the time required to complete a set of operations
    3. one oscillation of the regular voltage waveform used to synchronize processes in a digital computer
14. (in generative grammar) the set of cyclic rules

verb

1. tr to process through a cycle or system
2. intr to move in or pass through cycles
3. to travel by or ride a bicycle or tricycle

cycle

/ sī′kəl /

1. A single complete execution of a periodically repeated phenomenon.
2. See also period
3. A circular or whorled arrangement of flower parts such as those of petals or stamens.

Derived Forms

• ˈcycling, nounadjective

Other Words From

• super·cycle noun

Word History and Origins

Origin of cycle¹

First recorded in 1350–1400; Middle English cicle, from Late Latin cyclus, from Greek kýklos “cycle, circle, wheel, ring, disk, orb”; wheel

Word History and Origins

Origin of cycle¹

C14: from Late Latin cyclus, from Greek kuklos cycle, circle, ring, wheel; see wheel

Idioms and Phrases

Idioms

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

Example Sentences

For instance, women tend to report worse sleep during the time in their menstrual cycle when estrogen and progesterone are at their lowest.

From Science Daily

While Gaetz promised to break “the cycle of weaponizing DOJ,” some seemed sure he would do just that, especially given Trump’s claimed mandate to gut the entire department.

From Salon

What is it like for you knowing you’re going to have to go through this whole promotional cycle again, that there’s a whole secret movie that people want to know about?

From Los Angeles Times

The ship will also begin its annual maintenance cycle, with two weeks of inspections scheduled for early December, before carrying its first passengers from Troon to Brodick on Arran, probably in mid-January.

From BBC

Converting CO2 into a fuel using renewable electricity has the potential to close the carbon cycle.

From Science Daily

Related Words

• course
• period
• revolution
• rhythm
• round
• series