Dictionary / radiant
radiant
- adjective
- noun
- from Latin
Radiating light and/or heat.
1 All current definitions
Every sense of “radiant” in current use, as recorded by Wiktionary. Older and obsolete senses are kept separately.
adjective
- Radiating light and/or heat.
the radiant sun
- Emitted as radiation.
- figurativelyBeaming with vivacity and happiness.
a radiant face
- figurativelyStrikingly beautiful.
And yet she was ensnaringly beautiful, despite her pride and self-consciousness; radiant and certain of conquest she stood before the man who alone seemed to have neither eye nor ear for charms that had never elsewhere played her false.1893, E. Werner, Clear the Track!, page 94:
- Emitting or proceeding as if from a center.
- Giving off rays.
the sun radiant
- Having a ray-like appearance, like the large marginal flowers of certain umbelliferous plants; said also of the cluster which has such marginal flowers.
noun
- A point source from which radiation is emitted.
- The apparent origin, in the night sky, of a meteor shower.
- A straight line proceeding from a given point, or fixed pole, about which it is conceived to revolve.
Cross-check: WordNet senses (1)
- adjectiveradiating or as if radiating light — also: beaming, beamy, effulgent, refulgent
2 History of the word
The etymology, the path the word travelled, and the words built from it.
The word’s journey, newest to oldest:
- English (today)radiant
- Middle Englishradyant
- Latinradiāns
From Middle English radyant, from Latin radiāns, radiantis, present participle of radiāre (“to emit rays or beams”).
Derivatives — words built from “radiant”
Phrases & compounds
Want to go deeper? See also “radiant” on Etymonline ↗
3 Original language
Where “radiant” came from before it was English.
4 Original meaning
What the word meant at the oldest point the record reaches.
Wiktionary’s etymology does not give a separate meaning for the earliest form of “radiant”, so we don’t state one. The historical dictionary entry below shows how the word was understood in 1913.
Historical meaning — Webster’s 1913
A historical record, labelled as such: some of these senses are dated or have since shifted.
radiant a. [L. radians, -antis, p. pr. of radiare to emit rays or beams, fr. radius ray: cf. F. radiant. See Radius, Ray a divergent line.]
- Emitting or proceeding as from a center; resembling rays; radiating; radiate.
- Especially, emitting or darting rays of light or heat; issuing in beams or rays; beaming with brightness; emitting a vivid light or splendor; as, the radiant sun.
- Beaming with vivacity and happiness; as, a radiant face.
- Giving off rays; -- said of a bearing; as, the sun radiant; a crown radiant.
radiant n.
- The luminous point or object from which light emanates; also, a body radiating light brightly.
- A straight line proceeding from a given point, or fixed pole, about which it is conceived to revolve.
- The point in the heavens at which the apparent paths of shooting stars meet, when traced backward, or whence they appear to radiate.
5 Use it with confidence
Model sentences from the sources, matched to the meaning they show. Read each one aloud, then make your own in the game.
adjectiveMeaning: Radiating light and/or heat.
the radiant sun
The couple's sustainability efforts also included installing radiant heat under the concrete-slab floor.2026 May 28, Julie Belcove, “Farm Fresh”, in Architectural Digest, volume 83, number 4, page 93:
adjectiveMeaning: Beaming with vivacity and happiness.
a radiant face
Nurse Cramer had a cute nose and a radiant, blooming complexion dotted with fetching sprays of adorable freckles that Yossarian detested.1961 November 10, Joseph Heller, “The Soldier in White”, in Catch-22 […], New York, N.Y.: Simon and Schuster, →OCLC, page 171:
adjectiveMeaning: Strikingly beautiful.
And yet she was ensnaringly beautiful, despite her pride and self-consciousness; radiant and certain of conquest she stood before the man who alone seemed to have neither eye nor ear for charms that had never elsewhere played her false.1893, E. Werner, Clear the Track!, page 94:
adjectiveMeaning: Giving off rays.
the sun radiant
a crown radiant
adjectiveMeaning: radiating or as if radiating light
a radiant sunrise
Three steps to owning it
- Pick one meaning above and read its model sentence out loud.
- Say who or what the word is about in your own life, then build a sentence around that.
- Check it against the definition: would a careful reader understand exactly that meaning?
6 The mastery game
Play it here, or print it and do it with pen and paper. At the end you will know the meanings, history, origin and original meaning — and you will have used the word yourself.
Say it, then spell it
radiant
/ˈɹeɪ.di.ənt/
Say the word out loud three times, slowly. Notice the stressed syllable. When you are ready, hide it and spell it from memory.
Activate Words · Word-mastery worksheet · Name: ______________________ Date: __________
radiant
/ˈɹeɪ.di.ənt/ · adjective, noun
Step 1 — Say it and write it
Say “radiant” out loud three times. Then cover the word and write it three times from memory.
Step 2 — Know every meaning
Read each definition. Then write it again in your own words.
Step 3 — Which meaning is it?
“the radiant sun”
Circle the meaning used.
“a radiant face”
Circle the meaning used.
“the sun radiant”
Circle the meaning used.
Step 4 — History and origin
Write the word’s journey back in time (each language and form):
Write three words built from “radiant” and what each means:
Step 5 — Original meaning
Read the etymology on the page. What does it tell you about the word’s earlier meaning?
How does that original meaning connect to the meanings today?
Step 6 — Use it yourself
☐ I can explain its meanings ☐ I know its history ☐ I know its original language ☐ I know its original meaning ☐ I can use it confidently
Answer key — radiant
Which meaning, sentence 1: C. Radiating light and/or heat.
Which meaning, sentence 2: A. Beaming with vivacity and happiness.
Which meaning, sentence 3: A. Giving off rays.
Origin: A. Latin (Latin radiāns)
Journey: English radiant ← Middle English radyant ← Latin radiāns
Some derivatives: octoradiant, radiance, radiancy, radiantly, radiantness, subradiant, superradiant, unradiant
Etymology: From Middle English radyant, from Latin radiāns, radiantis, present participle of radiāre (“to emit rays or beams”).
Sources: Wiktionary “radiant” (https://en.wiktionary.org/wiki/radiant#English), CC BY-SA 4.0, via kaikki.org; Princeton WordNet 3.0; Webster’s Revised Unabridged Dictionary (1913, public domain) via GCIDE. Worksheet from https://activatewords.com/w/radiant