The American Heritage® Dictionary of the English Language, 4th Edition
n. Any of numerous chiefly marine fishes of the order Pleuronectiformes, including the flounders, soles, and halibuts, having a laterally compressed body with both eyes on the upper side.
n. 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 GNU version of the Collaborative International Dictionary of English
n. Any fish of the family Pleuronectidæ; esp., the winter flounder (Pleuronectes Americanus). The flatfishes have the body flattened, swim on the side, and have eyes on one side, as the flounder, turbot, and halibut. See flounder.
The Century Dictionary and Cyclopedia
n. Any fish of the suborder Heterosomata: so called from the flattened bilaterally unsymmetrical form.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. sweet lean whitish flesh of any of numerous thin-bodied fish; usually served as thin fillets
n. 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
Word Usage
"Yes | No | Report from bgreen902 wrote 28 weeks 1 day ago the flatfish is mY favorite lure. .caught a 24 3/4 inch rainbow on one of these about 2 months ago. .comin back from the taxidermist soon"