From WordNet (r) 3.0 (2006):
bad
adv 1: with great intensity (`bad' is a nonstandard variant for
`badly'); "the injury hurt badly"; "the buildings were
badly shaken"; "it hurts bad"; "we need water bad" [syn:
badly, bad]
2: very much; strongly; "I wanted it badly enough to work hard
for it"; "the cables had sagged badly"; "they were badly in
need of help"; "he wants a bicycle so bad he can taste it"
[syn: badly, bad]
adj 1: having undesirable or negative qualities; "a bad report
card"; "his sloppy appearance made a bad impression"; "a
bad little boy"; "clothes in bad shape"; "a bad cut";
"bad luck"; "the news was very bad"; "the reviews were
bad"; "the pay is bad"; "it was a bad light for reading";
"the movie was a bad choice" [ant: good]
2: very intense; "a bad headache"; "in a big rage"; "had a big
(or bad) shock"; "a bad earthquake"; "a bad storm" [syn:
bad, big]
3: feeling physical discomfort or pain (`tough' is occasionally
used colloquially for `bad'); "my throat feels bad"; "she
felt bad all over"; "he was feeling tough after a restless
night" [syn: bad, tough]
4: (of foodstuffs) not in an edible or usable condition; "bad
meat"; "a refrigerator full of spoilt food" [syn: bad,
spoiled, spoilt]
5: feeling or expressing regret or sorrow or a sense of loss
over something done or undone; "felt regretful over his
vanished youth"; "regretful over mistakes she had made"; "he
felt bad about breaking the vase" [syn: regretful, sorry,
bad] [ant: unregretful, unregretting]
6: not capable of being collected; "a bad (or uncollectible)
debt" [syn: bad, uncollectible]
7: below average in quality or performance; "a bad chess
player"; "a bad recital"
8: nonstandard; "so-called bad grammar"
9: not financially safe or secure; "a bad investment"; "high
risk investments"; "anything that promises to pay too much
can't help being risky"; "speculative business enterprises"
[syn: bad, risky, high-risk, speculative]
10: physically unsound or diseased; "has a bad back"; "a bad
heart"; "bad teeth"; "an unsound limb"; "unsound teeth"
[syn: bad, unfit, unsound]
11: capable of harming; "bad air"; "smoking is bad for you"
12: characterized by wickedness or immorality; "led a very bad
life"
13: reproduced fraudulently; "like a bad penny..."; "a forged
twenty dollar bill" [syn: bad, forged]
14: not working properly; "a bad telephone connection"; "a
defective appliance" [syn: bad, defective]
n 1: that which is below standard or expectations as of ethics
or decency; "take the bad with the good" [syn: bad,
badness] [ant: good, goodness]