1 the visible spectrum.
az: spektr
ru: спектр
2 the full range (of something): The actress's voice was capable of expressing the whole spectrum of emotion.
az: silsilə
ru: диапазон
3 the entire range of radiation of different wavelengths, part of which (the visible spectrum) is normally visible to the naked eye.
az: spektr
ru: диапазон; спектр
4 a similar range of frequencies of sound (the sound spectrum).
az: səs diapazonu
ru: диапазон