Sardine/ˌsɑːrˈdiːn/ Definition 1 of 2Pro Tip 1/3Canned Food Sardines are commonly sold in cans and known for their convenience and long shelf life. Let's buy a few cans of sardines for the camping trip. Pro Tip 2/3Culinary Usage Used in various recipes, sardines can be grilled, smoked, or added to pasta and salads. I'm making a salad with sardines and fresh tomatoes. Pro Tip 3/3Health Benefits Sardines are rich in omega-3 fatty acids, which are beneficial for heart health. My doctor recommended eating sardines for my heart.