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- Dictionaryrainbow/ˈreɪnbəʊ/
noun
- 1. an arch of colours visible in the sky, caused by the refraction and dispersion of the sun's light by rain or other water droplets in the atmosphere. The colours of the rainbow are generally said to be red, orange, yellow, green, blue, indigo, and violet: "all the colours of the rainbow"
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A rainbow is an optical phenomenon caused by refraction, internal reflection and dispersion of light in water droplets resulting in a continuous spectrum of light appearing in the sky. The rainbow takes the form of a multicoloured circular arc.
Learn the meaning of rainbow as a noun and an adjective, with synonyms, examples, and word history. Find out how rainbow is used in phrases, related articles, and medical slang.
RAINBOW definition: 1. an arch (= curved shape) of different colours seen in the sky when rain is falling and the sun…. Learn more.
noun. a bow or arc of prismatic colors appearing in the heavens opposite the sun and caused by the refraction and reflection of the sun's rays in drops of rain. Compare primary rainbow, secondary rainbow. a similar bow of colors, especially one appearing in the spray of a waterfall or fountain.
4 days ago · rainbow, series of concentric coloured arcs that may be seen when light from a distant source—most commonly the Sun—falls upon a collection of water drops—as in rain, spray, or fog. The rainbow is observed in the direction opposite to the Sun.
- The Editors of Encyclopaedia Britannica
Learn the meaning of rainbow as a noun, adjective and idiom, with examples of how to use it in different contexts. Find out the colors of the rainbow, the pot of gold at the end of the rainbow, and the Rainbows section of Girlguiding UK.
Oct 19, 2023 · A rainbow is a multicolored arc made by light striking water droplets. Learn how rainbows are formed, what colors they have, and what types of rainbows exist.
