Definition of “rainbow” - English Dictionary

british dictionary

“rainbow” in British English

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rainbownoun [ C ]

uk /ˈreɪn.bəʊ/ us /-boʊ/

B2 an arch (= curved shape) of different colours seen in the sky when rain is falling and the sun is shining:

The sun came out and we saw a rainbow.
The tropical butterfly's wings were shimmering with all the colours of the rainbow.

More examples

  • Look over there - there's a rainbow!
  • The glass prism refracted the white light into the colours of the rainbow.
  • The colours of the spectrum - red, orange, yellow, green, blue, indigo and violet - can be seen in a rainbow.
  • She did a stencil of a rainbow on her daughter's bedroom wall.
  • There's a double rainbow!

(Definition of “rainbow” from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)

“rainbow” in American English

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rainbownoun [ C ]

us /ˈreɪnˌboʊ/

an arch of many colors sometimes seen in the sky for a short time when it rains and the sun is shining

(Definition of “rainbow” from the Cambridge Academic Content Dictionary © Cambridge University Press)