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1. (biology) the process of decay caused by bacterial or fungal action
   - decomposition, rot, putrefaction, breakdown, biodegradation

1. Break down
   "The bodies rotted in the heat";
   - decompose, molder [N. Amer], moulder [Brit, Cdn]
    
2. Become physically weaker
   "Political prisoners are rotting away in many prisons all over the world";
   - waste

Type of: decay, degenerate, deteriorate, devolve, drop

Encyclopedia: Rotting