radioactive

/ˌreɪdioʊˈæktɪv/
adjective
  1. Giving off energy in the form of rays or particles because the atoms are unstable and breaking apart.
    • The old hospital had to safely dispose of radioactive waste.
    • Workers wear special suits to protect themselves from radioactive materials.
    • Uranium is a radioactive element used in nuclear power plants.
  2. Extremely dangerous or harmful, like something that gives off invisible, damaging energy.
    • That rumor is radioactive — don't repeat it or you'll get in trouble.
    • After the leak, the area was considered radioactive and no one could enter.
    • The politician's scandal was radioactive for his entire party.
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What does "radioactive" mean? | whatsthatwordmean | whatsthatwordmean