Meaning of decay in English
US /dəˈkeɪ/ UK /dɪˈkeɪ/
1. a slow, natural breaking down of plant or animal matter
tooth decay
2. a gradual decline in quality or strength
the decay of a woman's beauty
US /dəˈkeɪ/ UK /dɪˈkeɪ/
1. destroy or be destroyed slowly
Sugar makes your teeth decay.
2. decline gradually in quality or strength
What caused the Roman Empire to decay?