bad

Dictionary definition · bad

that which is below standard or expectations as of ethics or decency"take the bad with the good"

having undesirable or negative qualities"a bad report card"
serious or severe"a bad headache"
feeling physical discomfort or pain (‘tough’ is occasionally used colloquially for ‘bad’)"my throat feels bad"
(of foodstuffs) not in an edible or usable condition"bad meat"
feeling or expressing regret or sorrow or a sense of loss over something done or undone"felt regretful over his vanished youth"
not capable of being collected"a bad (or uncollectible) debt"
below average in quality or performance"a bad chess player"
nonstandard"so-called bad grammar"
not financially safe or secure"a bad investment"

with great intensity (‘bad’ is a nonstandard variant for ‘badly’)"the injury hurt badly"
very much; strongly"I wanted it badly enough to work hard for it"

Source: Open English WordNet (CC BY 4.0).