Label/ˈleɪbl/ Definition 1 of 4Pro Tip 1/3Object Identifier Labels often list contents or instructions for items like clothing, medicine, and food. Check the label for washing instructions. Pro Tip 2/3Brand Information A label can indicate the brand or manufacturer of a product, which can signify quality. She prefers dresses with a designer label. Pro Tip 3/3Warning Signals Labels can contain warnings or indicate if a product is dangerous or allergenic. The label said 'flammable'.