text: ir·ra·di·ate    ( P )  Pronunciation Key  (-rd-t)\nv. ir·ra·di·at·ed, ir·ra·di·at·ing, ir·ra·di·ates \nv. tr.\n\nTo expose to radiation. \nTo treat with radiation: irradiate farm produce so as to destroy bacteria. \nTo shed light on; illuminate. \nTo manifest in a manner suggesting the emission of light; radiate: irradiate goodness.