transitive verb irradiated -·at′ed, irradiating -·at′·ing

1. to shine or throw light upon; light up; make bright
2. to make clear; illuminate intellectually; enlighten
3. to radiate; diffuse; spread; give out
4. to expose to or treat by exposing to X-rays, ultraviolet rays, radium, or some other form of radiant energy
5. to heat with radiant energy

Etymology: < L irradiatus, pp. of irradiare, to beam upon, illumine: see in- & radiate

intransitive verb

1. to emit rays; shine
2. to become radiant

adjective