adjective “bad”
 bad, comparative worse, superlative worst
- lacking in quality or below the standard expected Sign up to see the translation of definitions and examples into any language. 
 The competitor's language-learning app is really bad. 
- inappropriate or not suitable for a certain situation or context Wearing pajamas to a job interview is in bad taste. 
- unhealthy, harmful Eating too much sugar is bad for your health. 
- feeling unwell After eating that expired yogurt, she looked really bad and had to lie down. 
- not behaving properly or acting in a disobedient way Tommy was being bad by drawing on the walls instead of his coloring book. 
- stressful, unpleasant Getting lost in a foreign city can be a really bad situation, especially without a phone. 
- morally wrong or evil The villain in the story was very bad, stealing from everyone in the village. 
- not working correctly or broken The fridge is making a strange noise; I think the motor is bad. 
- decomposed, not fit to eat The milk smelled sour, so I checked the date and realized it had gone bad. 
- having an unpleasant smell After eating garlic, he was self-conscious about his bad breath during the meeting. 
- lacking skill or proficiency (at something) Despite practicing for weeks, she was still bad at playing the violin. 
- severe, strong We are in a bad need of new financing. 
adverb “bad”
- (informal) to a great degree or intensely