Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

English definition of “spectrum”

spectrum

noun [C] (COLOURS)    /ˈspek.trəm/ (plural spectra or spectrums)
C2 the set of colours into which a beam of light can be separated, or a range of waves, such as light waves or radio waves: The colours of the spectrum - red, orange, yellow, green, blue, indigo, and violet - can be seen in a rainbow.Colour - general words
(Definition of spectrum noun (COLOURS) from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
Focus on the pronunciation of spectrum

More definitions for “spectrum”

Definitions of “spectrum” in other dictionaries

Word of the Day

altruistic

showing a wish to help or bring advantages to others, even if it results in disadvantage for yourself

Word of the Day

Blog

Read our blog about how the English language behaves.

Learn More

New Words

Find words and meanings that have just started to be used in English, and let us know what you think of them.

Learn More