Definition of "degeneration" in English

noun

1. (uncountable, countable) The process or state of growing worse, or the state of having become worse.

2. (uncountable) That condition of a tissue or an organ in which its vitality has become either diminished or perverted; a substitution of a lower for a higher form of structure.

   • fatty degeneration of the liver

3. (uncountable) Gradual deterioration, from natural causes, of any class of animals or plants or any particular organ or organs; hereditary degradation of type.

4. (countable) A thing that has degenerated.