text: define irradiated?   ir·ra·di·ate    ( p )  pronunciation key  (-rd-t) v. ir·ra·di·at·ed, ir·ra·di·at·ing, ir·ra·di·ates  v. tr.  to expose to radiation.  to treat with radiation: irradiate farm produce so as to destroy bacteria.  to shed light on; illuminate.  to manifest in a manner suggesting the emission of light; radiate: irradiate goodness.