A steak is a large flat piece of salmon without much fat on it. You cook it by grilling or frying it.
Steak is beef that is used for making stews. It is often cut into cubes to be sold.
A salmon fish steak is a large piece of fish that contains few bones.
A slice of beef, broiled or cut for broiling; By extension, a slice of meat of other large animals; as venison steak, bear steak, salmon.