Meaning 1technical · 82%
Emitting radiation from unstable atomic nuclei; said here of a material or object.
Natural examples
Das Labor bewahrt radioaktives Material sicher auf.
The laboratory stores radioactive material securely.
Das Warnschild kennzeichnet einen radioaktiven Bereich.
The warning sign marks a radioactive area.
Radioaktiver Abfall wird getrennt gesammelt.
Radioactive waste is collected separately.
Usage note
Radioaktiv is not normally compared. In everyday use it often modifies Stoff, Material, or Abfall; warning signs mark possible hazards.
Mini-lesson: radioaktiv
Emitting radiation from unstable atomic nuclei; said here of a material or object. Radioaktiv is not normally compared. In everyday use it often modifies Stoff, Material, or Abfall; warning signs mark possible hazards.
Check your learning
Choose one answer.Which definition matches «radioaktiv»?