opacityPronunciation: /ə(ʊ)ˈpasɪti/Definition of opacity noun [mass noun] the quality of lacking transparency or translucence:thinner paints need black added to increase opacity the quality of being obscure in meaning:the difficulty and opacity in Barthes' textsOrigin: mid 16th century: from French opacité, from Latin opacitas, from opacus 'darkened'opacity in other Oxford dictionaries Definition of opacity in the US English dictionary
