Definition of radiant in English:


Line breaks: ra¦di|ant
Pronunciation: /ˈreɪdɪənt


  • 2 [attributive] (Of electromagnetic energy, especially heat) transmitted by radiation, rather than conduction or convection: plants convert the radiant energy of the sun into chemical energy
    More example sentences
    • Thermal energy from infrared, radiant heat sources has been used to treat chronic human wounds with decreasing frequency during the past 25 years.
    • In the tandoor, the breads (necessarily flat in shape) are slapped onto the vertical wall, where they bake quite quickly by a combination of radiant heat and convection.
    • There are many forms of energy, each of which can be classified into three categories: radiant energy, kinetic energy, and potential energy.
  • 2.1(Of an appliance) designed to emit radiant energy, especially for cooking or heating: a radiant heater
    More example sentences
    • This is the Hydronic radiant heating system that saves huge energy as well as money on heating larger areas of your home/office environment.
    • A typical radiant heating and cooling system starts with a high-performance glazing system, integrated with light shelves and exterior shades as needed.
    • Consequently, incubator care is associated with less insensible water loss, and lower fluid requirements, than nursing infants in open cots under radiant heaters.


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  • 1A point or object from which light or heat radiates, especially a heating element in an electric or gas heater: I sat down by my hissing gas fire—one of the radiants was missing
  • 1.1 Astronomy A radiant point: don’t assume that you should stare toward the radiant to see the most meteors
    More example sentences
    • The Perseid radiant will just be rising above the north-northeastern horizon around 9 PM.



More example sentences
  • If only all nature, all humanity were bathed in a rosy glowing radiancy and life for the future seemed naught but buoyancy and light.
  • It was almost pure and absolute white, with delicate and slender curls and a shining radiancy that made my eyes widen.


More example sentences
  • He beams radiantly, reaches out to shake my hand, and says: ‘Welcome to Big Rock.’
  • Looking radiantly healthy - in contrast to her wan mien of recent months - she lucidly defended herself the interviewers tried to extract an apology from her.
  • Outwardly, Gina didn't seem troubled - she babysat for neighbors, wrote cute poems, and smiled radiantly for pictures.


late Middle English: from Latin radiant- 'emitting rays', from the verb radiare (see radiate).

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Pronunciation: ˌkɒlərəˈtjʊərə
elaborate ornamentation of a vocal melody