from The American Heritage® Dictionary of the English Language, 5th Edition.

  • intransitive verb To send out rays or waves.
  • intransitive verb To issue or emerge in rays or waves.
  • intransitive verb To extend in straight lines from or toward a center; diverge or converge like rays.
  • intransitive verb To spread into new habitats and thereby diverge or diversify. Used of a group of organisms.
  • intransitive verb To emit (light or energy) in rays or waves.
  • intransitive verb To send or spread out from or as if from a center.
  • intransitive verb To irradiate or illuminate (an object).
  • intransitive verb To manifest in a glowing manner.
  • adjective Botany Having rays or raylike parts, as in the flower heads of daisies.
  • adjective Biology Characterized by radial symmetry.
  • adjective Surrounded with rays.

from The Century Dictionary.

  • To be directed, as rays, toward a common center: as, “spokes radiating to an axle.”
  • Having a ray, rays, or ray-like parts; having lines or projections proceeding from a common center or surface; rayed: as, a radiate animal (a member of the Radiata); a radiate mineral (one with rayed crystals or fibers); a radiate flower-head.
  • Constituting a ray or rays; proceeding or extending outward from a center or focus; radiating: as, the radiate fibers of some minerals and plants; the radiate petals of a flower or florets of a head.
  • In numismatic and similar descriptions, represented with rays proceeding from it, as a head or bust: as, the head of the Emperor Caracalla, radiate; the head of Helios (the sun-god), radiate.
  • noun A ray-like projection; a ray.
  • noun A member of the Radiata, in any sense.
  • To issue and proceed in rays or straight lines from a point; spread directly outward from a center or nucleus, as the spokes of a wheel, heat and light, etc.
  • To emit rays; be radiant: as, a radiating body.
  • To spread in all directions from a central source or cause; proceed outward as from a focus to all accessible points.
  • To emit or send out in direct lines, as from a point or focus; hence, to cause to proceed or diverge in all directions, as from a source or cause; communicate by direct emanation: as, the sun radiates heat and light.
  • To furnish with rays; cause to have or to consist of rays; make radial.

from the GNU version of the Collaborative International Dictionary of English.

  • intransitive verb To emit rays; to be radiant; to shine.
  • intransitive verb To proceed in direct lines from a point or surface; to issue in rays, as light or heat.
  • transitive verb To emit or send out in direct lines from a point or points.
  • transitive verb rare To enlighten; to illuminate; to shed light or brightness on; to irradiate.
  • noun (Zoöl.) One of the Radiata.
  • adjective Having rays or parts diverging from a center; radiated.
  • adjective (Bot.) Having in a capitulum large ray florets which are unlike the disk florets, as in the aster, daisy, etc.
  • adjective (Zoöl.) Belonging to the Radiata.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • verb To extend, send or spread out from a center like radii.
  • verb transitive To emit rays or waves.
  • verb intransitive To come out or proceed in rays or waves.
  • verb transitive To illuminate.
  • verb To expose to ionizing radiation, such as by radiography.
  • verb transitive To manifest oneself in a glowing manner.
  • verb ecology, intransitive to spread into new habitats, migrate.
  • adjective radiating from a center.
  • adjective surrounded by rays, such as the head of a saint in a religious picture.
  • adjective botany having parts radiating from the center, such as the petals in many flowers.
  • adjective biology having radial symmetry, such as a seastar.
  • noun zoology One of the Radiata.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • verb send out rays or waves
  • verb issue or emerge in rays or waves
  • verb extend or spread outward from a center or focus or inward towards a center
  • verb spread into new habitats and produce variety or variegate
  • verb cause to be seen by emitting light as if in rays
  • adjective arranged like rays or radii; radiating from a common center
  • verb send out real or metaphoric rays
  • verb experience a feeling of well-being or happiness, as from good health or an intense emotion


from The American Heritage® Dictionary of the English Language, 4th Edition

[Latin radiāre, radiāt-, to emit beams, from radius, ray.]

from Wiktionary, Creative Commons Attribution/Share-Alike License

From Latin radiatus, past participle of radiare ("to radiate, furnish with spokes, give out rays, radiate, shine"), from radius ("a spoke, ray").


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  • In broadcasting radio or television programmes are radiated.

    April 17, 2012