| Noun | 1. colouring - a digestible substance used to give color to food; "food color made from vegetable dyes"coloring, food color, food coloring, food colour, food colouringfood product, foodstuff - a substance that can be used or prepared for use as food | | 2. colouring - a visual attribute of things that results from the light they emit or transmit or reflect; "a white color is made up of many different wavelengths of light"color, coloring, colourvisual property - an attribute of visionprimary color, primary colour - any of three colors from which all others can be obtained by mixingheather mixture, heather - interwoven yarns of mixed colors producing muted greyish shades with flecks of colormottle - an irregular arrangement of patches of color; "it was not dull grey as distance had suggested, but a mottle of khaki and black and olive-green"tint, shade, tincture, tone - a quality of a given color that differs slightly from another color; "after several trials he mixed the shade of pink that she wanted"chromatic color, chromatic colour, spectral color, spectral colour - a color that has hueachromatic color, achromatic colour - a color lacking hue; white or grey or blackcoloration, colouration - appearance with regard to color; "her healthy coloration"complexion, skin color, skin colour - the coloring of a person's facedithered color, dithered colour, nonsolid color, nonsolid colour - a color produced by a pattern of differently colored dots that together simulate the desired color | | 3.colouring - the act or process of changing the color of somethingcoloringchange of color - an act that changes the light that something reflectstinting - the act of adding a tinge of color; "the hairdresser gave her hair a modest tinting"hair coloring - the act of dyeing or tinting one's hairdyeing - the use of dye to change the color of something permanently |