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English definition of “spectrum”

spectrum

noun [C] uk   /ˈspek.trəm/ (plural spectra or spectrums) us  

spectrum noun [C] (COLOURS)

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.

spectrum noun [C] (RANGE)

C1 a range of opinions, feelings, etc.: He has support from across the whole political spectrum. The group includes students from both ends of the social spectrum (= range of social classes). A wide spectrum of opinion was represented at the meeting.
(Definition of spectrum from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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