Definition of rayonnant in English:

rayonnant

adjective

  • Relating to or denoting a French style of Gothic architecture prevalent from c.1230 to c.1350, characterized by distinctive rose windows.

    • ‘Rayonnant Gothic is a type of Gothic that originated around the court of saint-Louis (Louis IX of France).’
    • ‘The Sainte-Chapelle is a superb example of the Rayonnant style in Gothic architecture.’

Origin

French, literally radiating, from the pattern of radiating lights in the windows.

Pronunciation:

rayonnant

/ˌreɪjɒˈnɒ̃/