Definition and meaning of English word "radiation"
radiation
/ˌreɪdiˈeɪʃən/
Meaning
NounThe shooting forth of anything from a point or surface, like diverging rays of light.
How to use
The term 'radiation' is commonly used in formal and technical contexts, particularly in fields such as physics, medicine, and environmental science. A notable grammatical nuance is that 'radiation' can be used as a mass noun, which may lead learners to mistakenly use it in plural form. For instance, 'The radiation levels are high' is correct, whereas 'The radiations levels are high' is incorrect.
🇬🇧 English
radiation
Example
heat radiation
Your personal vocabulary
🦊 Use this word in a live AI conversationSynonyms
Common phrases
- ionizing radiation— ionizing radiation
- radiation therapy— radiation therapy
- background radiation— background radiation
This concept in other languages
Frequency rank: #1318 in English
Learn them all! 🚀
Master the 1000 most common English words with smart explanations, audio pronunciation, and spaced repetition.
Start Learning For Free →No sign-up required
Frequently Asked Questions
What does the English word "radiation" mean?▼
The English word "radiation" means "radiation" in English.
How do you pronounce the English word "radiation"?▼
You can hear the correct audio pronunciation of the word "radiation" by clicking the play button next to the word at the top of this page.
Can I see an example sentence with "radiation"?▼
Yes, here is a practical example: "Let's discuss the word radiation." (which translates as "radiation").
More Science & Research words
Related reading
Duolingo vs Anki vs Apps: Comparing Language Learning Methods in 2026
An honest comparison of popular language learning approaches: gamified apps, SRS flashcards, textbooks, tutors, and immersion. Pros, cons, and who each is best for.
Read →MethodWhat Is Spaced Repetition? The SM-2 Algorithm Explained Simply
Spaced repetition is the single most effective method for memorizing vocabulary. Learn how the forgetting curve works, how the SM-2 algorithm calculates review intervals, and why 20 minutes a day beats 2 hours of cramming.
Read →