Dozen/ˈdʌzn/ Definition 1 of 2Pro Tip 1/3Precise Quantity Used when you need to specify exactly twelve items, not more, not less. She ordered a dozen cupcakes for the party. Pro Tip 2/3Fixed Expressions Commonly paired with certain items like 'eggs' or 'roses' to indicate a standard pack or bundle. He gifted her a dozen red roses on Valentine's Day. Pro Tip 3/3Grouping Use 'dozen' to make counting larger quantities simpler by grouping them into twelves. The bakery sold cookies by the dozen.