halibut means: Flatfish is a low-fat, white, mild-flavored flatfish. It resembles a huge flounder. The “Chicken Halibuts”, which can weigh as much as ten pounds, are the most expensive halibut. (in Cooking Dictionary)

What else does halibut mean?

This is the largest flatfish member, and it can be found in both the Pacific Ocean and Atlantic oceans. It has a lean white flesh with a firm texture, which makes it mildly-flavored. (in Cooking Dictionary)

One of many large flatfishes that are edible from the genus. Hippoglossus Including related genera from the northern Atlantic and Pacific. (in Merlin Dictionary)