1. expose to radiation.Similartreat with radiationexpose to radiationX-ray
▪ expose (food) to gamma rays to kill microorganisms.
2. illuminate (something) by or as if by shining light on it:"sunlight streamed down through stained glass, irradiating the faces of family and friends"Similarilluminatelight uplightbrightencast light uponthrow light onshine onflood with lightliterary:illumine
Word Originlate 16th century (in the sense ‘emit rays, shine upon’): from Latin irradiat- ‘shone upon’, from the verb irradiare, from in- ‘upon’ + radiare ‘to shine’ (from radius ‘ray’).
