colouring

noun

1. a digestible substance used to give color to food

   noun.food

   Synonyms coloring food color food coloring food colour food colouring

   Source: WordNet 3.0

2. a visual attribute of things that results from the light they emit or transmit or reflect

   noun.attribute

   Synonyms color coloring colour

   Antonyms achromaticity achromatism colorlessness colourlessness

   Source: WordNet 3.0

3. the act or process of changing the color of something

   noun.act

   Synonyms coloring

   Source: WordNet 3.0