(bad) adjective worse, worst
1. Not good in any manner or degree; not up to standard; unsatisfactory; inferior; poor: a bad meal; They played a bad game and lost.
2. Disagreeable; unpleasant: bad weather; bad manners.
3. Inadequate; deficient: bad wiring.
4. Lacking skill or proficiency: a bad musician.
5. Rotten; decaying: bad apples.
6. Immoral; corrupt; wicked.
7. Mischievous; naughty; ill-behaved: a bad child.
8. Incorrect; erroneous: bad grammar.
9. Injurious; harmful: a bad habit.
10. Severe: a bad sprain.
11. Sick; in poor health.
12. Injured or diseased; not sound: a bad knee; a bad heart.
13. Sorry; concerned: to feel bad about it.
14. Inexpedient; wrong; improper; inauspicious: He spoke at a bad time and regretted it later.
15. Invalid; illegal: a bad check.
16. In finance, outstanding and not collectable: a bad debt.
—in bad Colloq.
1. In difficulty.
2. In disfavor.
—not bad Rather good: also not half bad, not so bad.
—noun
1. That which is bad.
2. Those who are bad, taken collectively.
3. A bad state or condition; bad luck; wickedness.
—to go to the bad Colloq. To degenerate; become bad.
—adverb Colloq. Badly. [ME bad, baddle, ? <OE bœddel effeminate man]
—bad′ness noun Synonyms (adj.): abominable, baleful, baneful, base, corrupt, corrupting, decayed, decaying, deceitful, deceptive, defective, deleterious, depraved, detrimental, dishonest, evil, false, foul, fraudulent, hurtful, ill, immoral, imperfect, incompetent, inferior, injurious, mean, mischievous, naughty, noxious, pernicious, poor, putrid, rascally, rotten, sad, saddening, scurvy, serious, severe, shabby, sinful, sorrowful, sorry, unfair, unfortunate, unhappy, unlucky, unprincipled, untrue, untrustworthy, unwelcome, unwholesome, unworthy, vile, villainous, wicked, worthless, wretched.
See HARD, IMMORAL, PERNICIOUS. Antonyms: see synonyms for GOOD.

(bad)
Obsolete past tense of BID.