Occurring or appearing at regular intervals. The periodic meetings helped the team stay on track with their project goals.
Relating to the periodic table of the elements. The periodic properties of elements are crucial for understanding chemical reactions.
In rhetoric or literary style: characterized by the use of periodic sentence structure, with the main clause placed at the end. His speech employed periodic sentences that held the audience in suspense until the final clause.
Mathematics: (of a function, sequence, or phenomenon) repeating values or states at fixed intervals; having a definite period. The sine curve is periodic with a period of 2π.