1. • noun - the process of gradually becoming inferior
   • noun - a gradual decrease
   • noun - the organic phenomenon of rotting
   • noun - an inferior state resulting from the process of decaying
   • noun - the spontaneous disintegration of a radioactive substance along with the emission of ionizing radiation
   • verb - lose a stored charge, magnetic flux, or current
   • verb - fall into decay or ruin
   • verb - undergo decay or decomposition
2. • To break down into component parts; rot.
   • To disintegrate or diminish by radioactive decay.
   • To decrease gradually in magnitude.
   • To decrease in orbit.
   • To fall into ruin: a civilization that had begun to decay.
   • To decline in health or vigor; waste away.
   • To cause to decay.
   • The destruction or decomposition of organic matter as a result of bacterial or fungal action; rot.
   • Rotted matter.
   • Radioactive decay.
   • The decrease in orbital altitude of an artificial satellite as a result of conditions such as atmospheric drag.
   • A gradual deterioration to an inferior state: tooth decay; urban decay.
   • To molder is to crumble to dust: Her grandmother’s shawl had moldered away in the trunk.

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