noun

"Waist" is a part of the human body located in the center of the torso, between the stomach and hips. It is often referred to as the narrowest part of the midsection.

Example

1. I need to buy a new dress that fits my waist properly.
2. The waist is often the first area to accumulate fat when people gain weight.
3. The dancer moved her waist in time with the music.