| 1. | recurring at intervals of time: periodic revivals of an interest in handicrafts. |
| 2. | occurring or appearing at regular intervals: periodic visits of a mail steamer to an island. |
| 3. | repeated at irregular intervals; intermittent: periodic outbreaks of the disease. |
| 4. | Physics. recurring at equal intervals of time. |
| 5. | Mathematics. (of a function) having a graph that repeats after a fixed interval (period) of the independent variable. |
| 6. | Astronomy.
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| 7. | pertaining to or characterized by rhetorical periods, or periodic sentences. |
periodic pe·ri·od·ic (pĭr'ē-ŏd'ĭk)
adj.
Having or marked by repeated cycles.
Recurring at regular intervals.