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English definition of “bad”

bad

adjective
 
 
/bæd/ (worse, worst)
NOT PLEASANT A1 not pleasant: bad weather bad news a bad dream My phone bill was even worse than I'd expected. He's in a bad mood today.Not of good qualityRubbish and wasteInformal words for badSerious and unpleasantNot attractive to look atInformal words for bad
LOW QUALITY A2 of low quality: bad behaviour The service was really bad. He's always been bad at UK maths/US math.Not of good qualityRubbish and wasteInformal words for bad
SEVERE B1 very serious or severe: a bad injury the worst flooding for yearsSerious and unpleasantNot attractive to look atInformal words for badVery and extremeComplete and wholeIntensifying expressions
NOT LUCKY B1 not lucky, not convenient, or not happening how you would like: It was just bad luck that she heard us. Is this a bad time to ask?Good luck and bad luck
not bad A2 satisfactory: "There are about 10 people in a group." "Oh well, that's not bad." That's not bad for such a small company.Informal words for goodGood, better and bestQuite good, or not very good
be bad for sb/sth A2 to be harmful for someone or something: Looking at a computer screen for too long can be bad for your eyes. The negative publicity has been bad for business.Damaging and spoilingDestroying and demolishing
feel bad about sth/doing sth B1 to feel guilty or sorry about something that has happened: I felt bad about letting her down.Feeling sad and unhappy
too bad B1 mainly US informal used to say that you are sorry about a situation: "He didn't get the job." "Oh, that's too bad."Sympathy and compassion used to say that nothing can be done to change a situation: I know you don't want to go but it's too bad, we have to.Unkind, cruel and unfeelingViolent or aggressiveTreating people or animals badlyInsults and abuse
EVIL B1 evil: She's a really bad person.Morally wrong and evilDishonest
NOT FRESH B2 Bad food is not fresh and cannot be eaten.Not pleasant to eat or drink
PAINFUL [always before noun] If you have a bad arm, leg, heart, etc, there is something wrong with it and it is painful. → See also bad blood, be in sb's good/bad booksPain and painful
(Definition of bad from the Cambridge Learners Dictionary © Cambridge University Press)
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