adjective
Uncommon
radiant
RAY-dee-uhnt
Radiant (adjective) means giving off light or heat; shining brightly. Example: “The radiant heat from the fireplace warmed the whole room.”
adjective
1
Giving off light or heat; shining brightly.
"The couple's sustainability efforts also included installing radiant heat under the concrete-slab floor."
— Julie Belcove, Farm Fresh (2026)
"The radiant heat from the fireplace warmed the whole room."
2
Glowing with happiness, health, or beauty.
"She looked radiant on her wedding day."
How to use radiant
Learner’s notesIn plain EnglishShining brightly, or (of a person) glowing with happiness or beauty.
Common pairings
radiant smile
radiant heat
radiant glow
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Word forms
- Plural
- radiants
- Comparative
- more radiant
- Superlative
- most radiant
Fill the gap
Can you complete this real example?
The _____ heat from the fireplace warmed the whole room.
Etymology
From Latin radians/radiantis, the present participle of radiare, "to give off rays".
Related words
Rhymes for radiant
See all rhymes for radiant →Frequently asked questions
What does “radiant” mean?
The word “radiant” means giving off light or heat; shining brightly. In plain terms, shining brightly, or (of a person) glowing with happiness or beauty.
How do you pronounce “radiant”?
“Radiant” is pronounced RAY-dee-uhnt (/ˈɹeɪ.di.ənt/ in IPA).
How do you use “radiant” in a sentence?
Here is “radiant” used in a sentence: “The radiant heat from the fireplace warmed the whole room.”
What part of speech is “radiant”?
“Radiant” is an adjective.
Where does the word “radiant” come from?
The word “radiant” comes from Latin. From Latin radians/radiantis, the present participle of radiare, "to give off rays".
Is “radiant” a common word?
“Radiant” is an uncommon word in modern English.
How many meanings does “radiant” have?
“Radiant” has 2 distinct senses listed in this dictionary. The most common is: giving off light or heat; shining brightly.
