Meaning & use

rainbow

noun·Everyday

Last updated

UK/ˈreɪnbəʊ/
US/ˈreɪnboʊ/

Meanings

  1. nouncountable

    A curved band of colors that appears in the sky when sunlight shines through drops of water.

    Grammar: Countable: you can see 'a rainbow' or 'two rainbows'.

    Patterns

    • a rainbow appears
    • see a rainbow

    After the storm, a beautiful rainbow stretched across the sky.

    We saw a double rainbow over the hills.

  2. nouncountablefigurative

    A wide variety of different things or opinions, especially when they are colorful or diverse.

    Grammar: Often used in the phrase 'a rainbow of something'.

    Patterns

    • a rainbow of something

    The festival attracted a rainbow of cultures from around the world.

    The committee includes a rainbow of opinions on the issue.

Word forms

pluralrainbows

Common combinations

a rainbow appears
A rainbow appeared after the rain.
chase a rainbow
He's always chasing rainbows instead of facing reality.
the colors of the rainbow
The flag has all the colors of the rainbow.
a rainbow of colors
The garden was a rainbow of colors in spring.

Synonyms and how they differ

spectrum
A range of colors or ideas; more technical and not limited to the sky.
arc
A curved shape; it can describe the shape of a rainbow but not the colors.

Word family

rainbow-colored adjective
Having many bright colors like a rainbow.

Commonly confused: rainbow or rain bow?

rainbow vs rain bow

Sometimes spelled as two words by mistake, but the correct spelling is one word: 'rainbow'.

Practice

After the rain, we saw a colorful ______ in the sky.

Make it your own

Write a sentence using “rainbow”, then check it and compare it with the examples above.

Your sentence stays on this page and is not sent anywhere.

Explore more words