—adj. 1. not good in any manner or degree.
2. having a wicked or evil character; morally reprehensible: There is no such thing as a bad boy. 3. of poor or inferior quality; defective; deficient: a bad diamond; a bad spark plug. 4. inadequate or below standard; not satisfactory for use: bad heating; Living conditions in some areas are very bad. 5. inaccurate, incorrect, or faulty: a bad guess. 6. invalid, unsound, or false: a bad insurance claim; bad judgment. 7. causing or liable to cause sickness or ill health; injurious or harmful: Too much sugar is bad for your teeth. 8. suffering from sickness, ill health, pain, or injury; sick; ill: He felt bad from eating the green apples. 9. not healthy or in good physical condition; diseased, decayed, or physically weakened: A bad heart kept him out of the army. 10. tainted, spoiled, or rotten, esp. to the point of being inedible: The meat is bad because you left it out of the refrigerator too long. 11. having a disastrous or detrimental effect, result, or tendency; unfavorable: The drought is bad for the farmers. His sloppy appearance made a bad impression. 12. causing or characterized by discomfort, inconvenience, uneasiness, or annoyance; disagreeable; unpleasant: I had a bad flight to Chicago. 13. easily provoked to anger; irascible: a bad temper. 14. cross, irritable, or surly: If I don't have my morning coffee, I'm in a bad mood all day. 15. more uncomfortable, persistent, painful, or dangerous than usual; severe: a bad attack of asthma. 16. causing or resulting in disaster or severe damage or destruction: a bad flood. 17. regretful, contrite, dejected, or upset: He felt bad about having to leave the children all alone. 18. disobedient, naughty, or misbehaving: If you're bad at school, you'll go to bed without supper. 19. disreputable or dishonorable: He's getting a bad name from changing jobs so often. 20. displaying a lack of skill, talent, proficiency, or judgment: a bad painting; Bad drivers cause most of the accidents. 21. causing distress; unfortunate or unfavorable: I'm afraid I have bad news for you. 22. not suitable or appropriate; disadvantageous or dangerous: It was a bad day for fishing. 23. inclement; considered too stormy, hot, cold, etc.: We had a bad winter with a lot of snow. 24. disagreeable or offensive to the senses: a bad odor. 25. exhibiting a lack of artistic sensitivity: The room was decorated in bad taste. 26. not in keeping with a standard of behavior or conduct; coarse: bad manners. 27. (of a word, speech, or writing)
a. vulgar, obscene, or blasphemous: bad language. b. not properly observing rules or customs of grammar, usage, spelling, etc.; incorrect: He speaks bad English. 28. unattractive, esp. because of a lack of pleasing proportions: She has a bad figure. 29. (of the complexion) marred by defects; pockmarked or pimply; blemished: bad skin. 30. not profitable or worth the price paid: The land was a bad buy. 31. Com.deemed uncollectible or irrecoverable and treated as a loss: a bad debt. 32. ill-spent; wasted: Don't throw good money after bad money. 33. counterfeit; not genuine: There was a bad ten-dollar bill in with the change. 34. having the character of a villain; villainous: In the movies the good guys always beat the bad guys. 35. Sports.failing to land within the in-bounds limits of a court or section of a court; missing the mark; not well aimed.
36. Slang.outstandingly excellent; first-rate: He's a bad man on drums, and the fans love him. 37. in a bad way, in severe trouble or distress.
38. not bad, a. tolerably good; not without merit: The dinner wasn't bad, but I've had better. b. not difficult: Once you know geometry, trigonometry isn't bad.Also,not so bad,not too bad. 39. too bad, unfortunate or disappointing: It's too bad that he didn't go to college.
—n. 1. that which is bad: You have to take the bad with the good. 2. a bad condition, character, or quality: His health seemed to go from bad to worse. 3. (used with a pl. v.) evil persons collectively (usually prec. by the): The bad are always stirring up trouble. 4. go to the bad, to deteriorate physically or morally; go to ruin: She wept at seeing her son go to the bad. 5. in bad,Informal. a. in trouble or distress.
b. in disfavor: He's in bad with his father-in-law. 6. to the bad, in arrears: He's $100 to the bad on his debt.
—adv.Informal. 1. badly: He wanted it bad enough to steal it. 2. bad off, in poor or distressed condition or circumstances; destitute: His family has been pretty bad off since he lost his job.Also,badly off.Cf. well-off.
Pronunciation: (bad),[key] —v.Archaic. a pt. of bid.