[ verb rey-dee-eyt; adjective rey-dee-it, -eyt ]
See synonyms for radiate on Thesaurus.com
verb (used without object),ra·di·at·ed, ra·di·at·ing.
  1. to extend, spread, or move like rays or radii from a center.

  2. to emit rays, as of light or heat; irradiate.

  1. to issue or proceed in rays.

  2. (of persons) to project or glow with cheerfulness, joy, etc.: She simply radiates with good humor.

verb (used with object),ra·di·at·ed, ra·di·at·ing.
  1. to emit in rays; disseminate, as from a center.

  2. (of persons) to project (joy, goodwill, etc.).

  1. radiating from a center.

  2. having rays extending from a central point or part: a coin showing a radiate head.

  1. radiating symmetrically.

Origin of radiate

First recorded in 1610–20, radiate is from the Latin word radiātus (past participle of radiāre to radiate light, shine). See radiant, -ate1

Other words from radiate

  • ra·di·a·ble, adjective
  • ra·di·a·bil·i·ty, ra·di·a·ble·ness, noun
  • ra·di·a·bly, ra·di·ate·ly, adverb
  • an·ti·ra·di·at·ing, adjective
  • in·ter·ra·di·ate, verb (used without object), in·ter·ra·di·at·ed, in·ter·ra·di·at·ing.
  • mul·ti·ra·di·ate, adjective
  • mul·ti·ra·di·at·ed, adjective
  • non·ra·di·at·ing, adjective
  • re·ra·di·ate, verb, re·ra·di·at·ed, re·ra·di·at·ing.
  • sub·ra·di·ate, adjective
  • un·ra·di·at·ed, adjective

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

British Dictionary definitions for radiate


  1. Also: eradiate to emit (heat, light, or some other form of radiation) or (of heat, light, etc) to be emitted as radiation

  2. (intr) (of lines, beams, etc) to spread out from a centre or be arranged in a radial pattern

  1. (tr) (of a person) to show (happiness, health, etc) to a great degree

adjective(ˈreɪdɪɪt, -ˌeɪt)
  1. having rays; radiating

  2. (of a capitulum) consisting of ray florets

  1. (of animals or their parts) showing radial symmetry

  2. adorned or decorated with rays: a radiate head on a coin

Origin of radiate

C17: from Latin radiāre to emit rays

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012