What is the meaning of rotting?

noun

• Biology) the process of decay caused by bacterial or fungal action.
  • synonyms: decomposition, rot, putrefaction

verb

• Break down.
  • usage: "The bodies decomposed in the heat"
  • synonyms: decompose, rot, molder, moulder
• Become physically weaker.
  • usage: "Political prisoners are wasting away in many prisons all over the world"
  • synonyms: waste, rot