DictionaryspectrumRange of variation
noun

spectrum

SPEK-trum/ˈspektrəm/

An ordered continuous range of variation.

These paint samples show a spectrum from almost white to nearly black.

A fan of seven matching paint-sample cards progresses smoothly from almost white through increasingly deep blue-gray to nearly black, making a full range of related tonal values visible.
Etymology

An “appearance” or “image” became the name for the visible band of colors produced by a prism. That ordered band supplied the model for a whole range of related qualities, positions, or values.

In context

CTV Santa Cruz County41:55
cultural philanthropy is recognized as an important value not just by a few people but by a very broad spectrum of the community
Cultural Council 1990 Artist of the Year

More examples

  • The survey captures a broad spectrum of political opinions.
  • Symptoms fall along a spectrum from mild to severe.
  • A prism separates white light into a spectrum of colors.

Forms

spectrum · spectra · spectrums

Similar words

range
Covers the extent of variation without requiring continuous ordering.
continuum
Emphasizes gradual transitions without sharp divisions between neighboring values.