To throw rays of light upon; to illuminate; to brighten; to adorn with luster. "Thy smile irradiates yon blue fields."
To enlighten intellectually; to illuminate; as, to irradiate the mind.
To animate by heat or light.
To radiate, shed, or diffuse. "A splendid façade,... irradiating hospitality."
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.