sweet lean whitish flesh of any of numerous thin-bodied fish; usually served as thin fillets
any of several families of fishes having flattened bodies that swim along the sea floor on one side of the body with both eyes on the upper side
A fish of the order Pleuronectiformes, the adults of which have both eyes on one side and usually swim with the other side down, such as a flounder, a halibut, or a sole.
The word comes from combining the words "flat" and "fish." It originally described a type of fish with a flattened body shape.