Definition from Wiktionary, the free dictionary
Jump to navigation Jump to search



Latin irradiatus


  • IPA(key): /ɪˈɹeɪdieɪt/
  • (file)


irradiate (third-person singular simple present irradiates, present participle irradiating, simple past and past participle irradiated)

  1. (transitive, literary, poetic) To throw rays of light upon; to illuminate; to brighten; to adorn with luster.
    • c. late 18th century Sir W. Jones, Hymn to Lachsmi
      Thy smile irradiates yon blue fields.
  2. (transitive, literary, poetic) To enlighten intellectually; to illuminate.
    to irradiate the mind
    • 1740 or earlier Bishop George Bull, A discourse concerning the spirit of God in the faithful
      And indeed we ought, in these happy intervals, when our understandings are thus irradiated and enlightened, to make a judgment of the state and condition of our souls in the sight of God []
  3. (transitive, literary, poetic) To animate by heat or light.
    (Can we find and add a quotation of Sir M. Hale to this entry?)
  4. (transitive, literary, poetic) To radiate, shed, or diffuse.
    • (Can we date this quote by H. James and provide title, author's full name, and other details?)
      a splendid facade, [] irradiating hospitality
  5. (transitive, literary, poetic) To decorate with shining ornaments.
  6. (intransitive) To emit rays; to shine.
  7. (sciences) To apply radiation to.
    1. (medicine) To treat (a tumour or cancerous growth) with radiation.
    2. (transitive) To treat (food) with ionizing radiation in order to destroy bacteria.




  1. Illuminated; irradiated; made brilliant or splendid.
    • 1801, Robert Southey, Thalaba the Destroyer:
      The co-existent Flame
      Knew the Destroyer; it encircled him,
      Roll’d up his robe, and gathered round his head,
      Condensing to intenser splendour there,
      His Crown of Glory, and his Light of Life,
      Hovered the irradiate wreath.

Related terms[edit]





  1. second-person plural present indicative of irradiare
  2. second-person plural imperative of irradiare
  3. second-person plural present subjunctive of irradiare
  4. feminine plural of irradiato