Definition of radiate in English:

Share this entry



Pronunciation: /ˈrādēˌāt/
1 [with object] Emit (energy, especially light or heat) in the form of rays or waves: the hot stars radiate energy
More example sentences
  • At each groove, plasmons scatter and radiate some light, while some plasmon energy remains to travel to the next groove.
  • Why is that electrons radiate electromagnetic energy when they are accelerated?
  • If a particle moves faster than the speed of light, it must create a shockwave, and radiate energy.
emit, give off, give out, discharge, diffuse;
shed, cast
1.1 [no object] (Of light, heat, or other energy) be emitted in the form of rays or waves: the continual stream of energy that radiates from the sun
More example sentences
  • In excited atoms, energy radiated as photons eventually leaks into the vast interstellar spaces and redshifts away.
  • The air in the field became warm and comforting, the light becoming so bright that you could feel the heat radiating.
  • Even though it was around five in the afternoon, heat was still radiating off the pavement and by the time I got home about ten minutes later, I was already drenched in sweat.
shine, beam, emanate
1.2(Of a person) clearly emanate (a strong feeling or quality) through their expression or bearing: she lifted her chin, radiating defiance
More example sentences
  • Greg never could put his finger on it, but she just radiated a good feeling and friendship when she was near.
  • Helen simply radiates happiness and there is a great sense of satisfaction and self-ease about her.
  • He was red in the face and he was practically radiating anger and hurt.
display, show, exhibit;
emanate, breathe, be a picture of
1.3 (radiate from) (Of a feeling or quality) emanate clearly from: leadership and confidence radiate from her
More example sentences
  • There was a reassuring air about him, a comforting quality that he seemed to radiate from within.
  • She was quiet, the depression and despair radiating from her body in a way that was painful just to be near.
  • He has continued to press calmly forward despite almost deranged hatred radiating from enemies.
2 [no object] Diverge or spread from or as if from a central point: he ran down one of the passages that radiated from the room
More example sentences
  • The volumes are arranged in a vaguely cruciform plan, with wings radiating out from a central core.
  • I was back recently to the Round Room under the heavy drum of the central rotunda from which the Four Courts radiate.
  • The building has an original design, with a central administrative section, and radiating out from this, the elementary school building, the high-school building and the gym.
fan out, spread out, branch out/off, extend, issue
2.1 Biology (Of an animal or plant group) evolve into a variety of forms adapted to new situations or ways of life.
Example sentences
  • During this time, the mammals radiated and evolved, but they could not make the breakthrough to becoming large or to diversifying their modes of like.
  • From there, the species has radiated into several subspecies, two of which occur in Europe and share a hybrid zone.
  • In any case, these animals quickly radiated into an extraordinary variety of large and small terrestrial herbivores and carnivores.


Pronunciation: /ˈrādēət/
Pronunciation: /ˈrādēˌāt/
Having rays or parts proceeding from a center; arranged in or having a radial pattern: the radiate crown
More example sentences
  • The flowers of the outer whorl of the head generally have five elongated petals united to form straplike structures and are restricted to the periphery of the radiate head.
  • Cronos glared up into the tree of life's radiate rainbow colored leaves.



Pronunciation: /-ˌātiv/
sense 1 of the verb.
Example sentences
  • Because its application does not require any model calculations of atmospheric radiative transfer, it is computationally fast and can, thus, be efficiently applied to calculate UV irradiation across a grid-point net.
  • Most commonly, this necessary absorption and radiative dispersal of heat is handled by a heatsink & fan, used in conjunction with a thin layer of thermal compound.
  • Due to the near-field nature of the coupling, signals can be guided around 90° corners and split via tee structures without radiative losses into the far field at the discontinuity.


Early 17th century: from Latin radiat- 'emitted in rays', from the verb radiare, from radius 'ray, spoke'.

Words that rhyme with radiate


For editors and proofreaders

Syllabification: ra·di·ate

Share this entry

What do you find interesting about this word or phrase?

Comments that don't adhere to our Community Guidelines may be moderated or removed.