gallbladder Syllabification: (gall·blad·der)Pronunciation: /ˈgôlˌbladər/ (also gall bladder)Definition of gallbladder noun the small sac-shaped organ beneath the liver, in which bile is stored after secretion by the liver and before release into the intestine. gallbladder in other Oxford dictionaries Definition of gallbladder in the British & World English dictionary