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English definition of “bad”

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bad

adjective uk   /bæd/ us  

bad adjective (UNPLEASANT)

A1 (worse, worst) unpleasant and causing difficulties or harm: Our holiday was spoiled by bad weather. We've just had some very bad news. I had a very bad night (= did not sleep well) last night. Watch out - he's in a bad mood (= being unpleasant to everyone). She's just a bad loser (= she is unpleasant when she loses). The company has been getting a lot of bad publicity (= negative things have been written or said about it) recently. The lines were so bad (= unpleasantly long) that I didn't bother waiting. The company's financial situation is looking pretty bad at the moment. The damage caused by the storm was nowhere near as/nothing like as bad (= not as serious) as we'd feared it might be. Breathing in other people's cigarette smoke is bad for you (= has a harmful effect on your health). This is a bad (= not convenient or suitable) time for me to talk. Can I call you back later?not (too) bad A2 informal fairly good or satisfactory: "How are things?" "Not too bad, thanks."not bad informal very good: He was best in his age group - not bad, eh?feel bad B1 to feel ashamed and sorry: Knowing that I hurt her makes me feel really bad. I feel bad about letting them down.go from bad to worse If a situation goes from bad to worse, it was difficult and unpleasant, and is becoming even more so: Things have gone from bad to worse.
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bad adjective (LOW QUALITY)

A2 (worse, worst) of low quality, or not acceptable: The plumber did a bad job on the repairs. Are the company's current difficulties a result of bad (= harmful) luck or bad (= of low quality) judgment? He has some very bad habits. In some parts of the world, it is considered bad manners to pick up food with the left hand. He was sent home from school for bad behaviour. That remark was in pretty bad taste, wasn't it? I'm very bad at cooking (= cannot do it very well).
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bad adjective (EVIL)

B1 (worse, worst) (of people or actions) evil or morally unacceptable: There are a lot of bad people in the world. He has his faults but he's not a bad person.
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bad adjective (PAINFUL)

C1 (worse, worst) causing or experiencing pain: She can't walk up all those steps, not with her bad leg! a bad cough

bad adjective (DECAYED)

B2 harmful to eat because of being decayed: We'd better eat this chicken before it goes bad.
badness
noun [U] uk   /ˈbæd.nəs/ us  
the quality of being evil or morally unacceptable: There is goodness and badness in everyone.

bad

adverb uk   /bæd/ US us  
informal for badly (= very much): He needs the money real bad. My arm hurts so bad.

bad

noun [U] uk   /bæd/ us  
things or events that are not good or that are morally wrong: She only ever sees the bad in people.
(Definition of bad from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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