Definition of irradiate verb from the Oxford Advanced Learner's Dictionary

     

    irradiate

     verb
    verb
    BrE BrE//ɪˈreɪdieɪt//
     
    ; NAmE NAmE//ɪˈreɪdieɪt//
     
    Verb Forms present simple I / you / we / they irradiate
    BrE BrE//ɪˈreɪdieɪt//
     
    ; NAmE NAmE//ɪˈreɪdieɪt//
     
    he / she / it irradiates
    BrE BrE//ɪˈreɪdieɪts//
     
    ; NAmE NAmE//ɪˈreɪdieɪts//
     
    past simple irradiated
    BrE BrE//ɪˈreɪdieɪtɪd//
     
    ; NAmE NAmE//ɪˈreɪdieɪtɪd//
     
    past participle irradiated
    BrE BrE//ɪˈreɪdieɪtɪd//
     
    ; NAmE NAmE//ɪˈreɪdieɪtɪd//
     
    -ing form irradiating
    BrE BrE//ɪˈreɪdieɪtɪŋ//
     
    ; NAmE NAmE//ɪˈreɪdieɪtɪŋ//
     
     
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  1. 1 irradiate something (specialist) to treat food with gamma radiation in order to preserve it
  2. 2irradiate something (with something) (literary) to make something look brighter and happier faces irradiated with joy
  3. Word Origin late 16th cent. (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’).
See the Oxford Advanced American Dictionary entry: irradiate