- The definition of a supersize is the largest size of an item available.
An example of a supersize is a supersize order of French fries, the largest size of French fries that you can buy at a fast food restaurant.
- To supersize is to order the largest size available, often for a meal deal at a fast food restaurant.
An example of supersize is to order a double cheeseburger meal at McDonald's and ask to get the largest sizes of fries and soft drink.
transitive verbsu·per·sized, su·per·siz·ing, su·per·siz·es
- To order (a portion of food) in the largest amount offered, especially at a fast-food restaurant.
- To enlarge (something) to an unusual or remarkable degree: “a $20 million renovation that supersized the playhouse in everything from backstage space to the size of its season” (Phil Gallo).