Define the term time period of vibration.

Explanation

**Step-by-Step Solution:**

1. **Definition of Vibration**: A vibration refers to the repeated back-and-forth motion of an object around a central point or mean position.

2. **Understanding Oscillation**: In the context of vibrations, an oscillation is defined as one complete cycle of movement. This includes moving from a starting point to an extreme position on one side, returning to the mean position, and then moving to the extreme position on the opposite side before returning to the starting point.

3. **Complete Cycle**: A complete vibration or oscillation consists of two movements: one in the forward direction (to one extreme) and one in the backward direction (to the original position).

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