Lettuce/ˈletɪs/ Definition 1 of 2Pro Tip 1/3Salad Base Lettuce is often a base for salads, not the topping. She prepared a bowl of lettuce to start her salad. Pro Tip 2/3Freshness Cue Lettuce in food adds a crisp, fresh taste, which can be a refreshing element. Fresh lettuce makes this wrap taste even better. Pro Tip 3/3Not Just Green Lettuce comes in varieties like iceberg and romaine, with differences in texture and taste. Romaine lettuce is crunchier than iceberg lettuce.