Pack/pæk/ Definition 1 of 6Pro Tip 1/2Quantity Indicator Indicates a defined quantity, highlighting that items are part of a set or collection. A pack of gum typically contains 10 pieces. Pro Tip 2/2Commercial Packaging 'Pack' often refers to how products are sold in stores, usually encased or grouped together. She decided to buy a six-pack of soda for the party.