[uncountable] a fine white or brown powder made from grain, especially wheat, and used in cooking for making bread, cakes, etc. see also plain flour, self-raising flour See related entries: Carbohydrates Word Origin Middle English: a specific use of flower in the sense ‘the best part’, used originally to mean ‘the finest quality of ground wheat’. The spelling flower remained in use alongside flour until the early 19th cent.Extra examples Blend the flour with a little milk to make a smooth paste. Rub the butter into the flour. Sift the flour and salt into a bowl.