- to shine or throw light upon; light up; make bright
- to make clear; illuminate intellectually; enlighten
- to radiate; diffuse; spread; give out
- to expose to or treat by exposing to X-rays, ultraviolet rays, radium, or some other form of radiant energy
- to heat with radiant energy
Origin of irradiate; from Classical Latin irradiatus, past participle of irradiare, to beam upon, illumine: see in- and amp; radiate
- to emit rays; shine
- to become radiant
lighted up; irradiated
verbir·ra·di·at·ed, ir·ra·di·at·ing, ir·ra·di·ates
- a. To expose to radiation.b. 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.
verb, intransitive Archaic
- To send forth rays; radiate.
- To become radiant.
Origin of irradiateLatin irradiare, irradiat-, to illuminate : in-, on; see in–2 + radiare, to shine; see radiate.
(third-person singular simple present irradiates, present participle irradiating, simple past and past participle irradiated)
- To throw rays of light upon; to illuminate; to brighten; to adorn with luster.
- To enlighten intellectually; to illuminate.
- to irradiate the mind
- To animate by heat or light.
- To radiate, shed, or diffuse.
- (intransitive) To emit rays; to shine.
- To treat (food) with ionizing radiation in order to destroy bacteria
From Latin irradiatus