Bladder

What is Bladder ?

Bladder is (noun) 1. the bag-shaped organ inside the body where urine collects before being passed out of the body She is taking antibiotics for a bladder infection. 2. any bag-shaped organ inside the body 3. a light bag full of air inside a football The nail went right through the football and pierced the bladder.

 

source: Easier English, Student Dictionary Upper Intermediate Level