Brill/brɪl/ Definition 1 of 1Pro Tip 1/3Culinary Term Used to describe the fish in cooking and menu contexts, often in restaurants. Do you prefer the brill or the salmon from the menu? Pro Tip 2/3Specific Species Refers to a particular flatfish species, not interchangeable with other similar fishes. The brill has a distinctive taste compared to other flatfish. Pro Tip 3/3Not Common Although edible, brill isn't as commonly known as other fish, like tuna or salmon. I've never tried brill before; is it good?