What is the meaning of the word "bad"?

Definitions:

below average in quality or performance adjective
- a bad chess player
characterized by wickedness or immorality adjective
- led a very bad life
feeling physical discomfort or pain (`tough' is occasionally used colloquially for `bad') adjective
- my throat feels bad
having undesirable or negative qualities adjective
- a bad report card
nonstandard adjective
- socalled bad grammar
not capable of being collected adjective
- a bad (or uncollectible) debt
not financially safe or secure adjective
- a bad investment
not in an edible or usable condition, in referring to foodstuffs adjective
- The meat was bad.
not working properly adjective
- a bad telephone connection
physically unsound or diseased adjective
- has a bad back
reproduced fraudulently adjective
- like a bad penny...
that which is below standard or expectations as of ethics or decency noun
- take the bad with the good
very intense adjective
- a bad headache
with great intensity (`bad' is a nonstandard variant for `badly') adverb
- the injury hurt badly