Meaning of radioactivate

ra•di•o•ac•ti•vate

Pronunciation: (rā"dē-ō-ak'tu-vāt"), [key]
— -vat•ed, -vat•ing.
  1. to make (a substance) radioactive.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.