rotten

American Heritage® Dictionary of the English Language, Fourth Edition

1. adj. Being in a state of putrefaction or decay; decomposed.
2. adj. Having a foul odor resulting from or suggestive of decay; putrid.
3. adj. Made weak or unsound by rot: rotten floorboards.
4. adj. Morally corrupt or despicable: She's rotten to the core.
5. adj. Very bad; wretched: rotten weather.
6. adv. To a very great degree: The child is spoiled rotten.

Century Dictionary and Cyclopedia

1. Undergoing natural decomposition; affected by rot or organic dissolution; putrid (as animal and some vegetable matters), soft (as fruits, etc.), or weak (as vegetable fibers, fabrics, etc.) from elemental decay: as, a rotten carcass or egg; a rotten log or plank; rotten cloth.
2. Putrid from organic decay, or from the presence of decomposing matter; hence, of a putrid quality; ill-smelling; fetid.
3. Affected with the disease called rot, as sheep or other animals.
4. Unsound as if from rotting; in a loose or disintegrated state; soft or friable; yielding: as, rotten iron or stone.
5. Unsound in character or quality; in a corrupt or untrustworthy state; destitute of stability or integrity.
6. In printing, said of bad prints from woodcuts, that show holes and broken lines.
7. n. A dialectal variant of ratten.
8. Good for nothing; trashy; mean; detestable.

Wiktionary

1. adj. Of perishable items, overridden with bacteria and other infectious agents.
2. adj. In a state of decay.
3. adj. Cruel, mean or immoral.
4. adj. Bad or terrible.
5. adv. To an extreme degree.

GNU Webster's 1913

1. adj. Offensive to the smell; fetid; disgusting.
2. adj. Not firm or trusty; unsound; defective; treacherous; unsafe.

WordNet 3.0

1. adj. damaged by decay; hence unsound and useless
2. adj. very bad
3. adj. having decayed or disintegrated; usually implies foulness