spec·trum/`spɛktrəm; ˈspektrəm/ n [C] 1 the set of different colours that light can be separated into 光谱: the full spectrum of colours of the rainbow 彩虹的七色光谱 2 a wide RANGE of different opinions, ideas, situations etc 〔意见、观点、情况等的广泛〕范围: The officials represent a wide spectrum of political opinion. 这些官员代表着各种不同的政见。