v. t. [ imp. & p. p. Irradiated p. pr. & vb. n. Irradiating ] [ L. irradiatus, p. p. of irradiate. See In- in, and Radiate. ] [ 1913 Webster ] 1. To throw rays of light upon; to illuminate; to brighten; to adorn with luster. [ 1913 Webster ] Thy smile irradiates yon blue fields. Sir W. Jones. [ 1913 Webster ] 2. To enlighten intellectually; to illuminate; as, to irradiate the mind. Bp. Bull. [ 1913 Webster ] 3. To animate by heat or light. Sir M. Hale. [ 1913 Webster ] 4. To radiate, shed, or diffuse. [ 1913 Webster ] A splendid façade, . . . irradiating hospitality. H. James. [ 1913 Webster ] 5. To expose to radiation of any kind, especially ionizing radiation; as, to sterilize food by irradiating it with gamma rays; one can cause mutations in bacteria by irradiating them with ultraviolet light. [ PJC ] | 
