noun

The bladder is a special organ in your body that stores pee. When it gets full, it tells your brain you need to go to the bathroom.

Example

1. The doctor said he needed to increase his water intake to help improve his bladder control.
2. The child had to wear diapers until he was able to control his bladder.
3. After drinking too much coffee, she had an urge to go to the bathroom to empty her bladder.