bitternessPronunciation: /bɪtənəs/Translate bitterness | into French | into German | into Italian | into Spanish Definition of bitterness noun 1sharpness of taste; lack of sweetness:the lime juice imparts a slight bitterness 2anger and disappointment at being treated unfairly; resentment:he expressed bitterness over his dismissal without noticebitterness in other Oxford dictionaries Definition of bitterness in the US English dictionary