what is the definition of periodic motion?

Question

for example a ferris wheel a clocks hands a child on a swing

Answer 1

Periodic motion is motion that repeats after a finite amount of time.

Answer 2

Simple Harmonic Motion is a special type of periodic motion where the accleration of the object is proportional to and in the opposite direction of its displacement from zero. So, in short, no.

Answer 3

Periodic motion is motion that repeats itself after a constant amount of time.