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Decay

dɪˈkeɪ

Decay definitions
verb
decay decayed decaying decays
  1. (of organic matter) rot or decompose through the action of bacteria and fungi

    "the body had begun to decay"

    • cause to rot or decompose

      "the fungus will decay soft timber"

    • fall into disrepair; deteriorate

      "facilities decay when money is not spent on refurbishment"

    • decline in quality, power, or vigour

      "the moral authority of the party was decaying"

    • (of a radioactive substance, particle, etc.) undergo change to a different form by emitting radiation

      "the trapped radiocarbon begins to decay at a known rate"

    • (of a physical quantity) undergo a gradual decrease

      "the time taken for the current to decay to zero"

noun
decay decays
  1. the state or process of rotting or decomposition

    "hardwood is more resistant to decay than softwood"

    • rotten matter or tissue

      "fluoride heals small spots of decay"

    • structural or physical deterioration

      "the old barn rapidly fell into decay"

    • the process of declining in quality, power, or vigour

      "the problems of urban decay"

    • the change of a radioactive substance, particle, etc. into another by the emission of radiation

      "the gas radon is produced by the decay of uranium in rocks and soil"

    • gradual decrease in the magnitude of a physical quantity

      "the required time constant for current decay is 1 ms"