The Collaborative International Dictionary of English v.0.48:

Steak \Steak\ (st[=a]k), n. [OE. steike, Icel. steik, akin to
   Icel. steikja to roast, stikna to be roasted or scorched, and
   E. stick, the steak being broiled on a spit. See Stick, v.
   t.]
   A slice of beef, broiled, or cut for broiling; -- also
   extended to the meat of other large animals; as, venison
   steak; bear steak; pork steak; turtle steak.
   [1913 Webster]

WordNet (r) 3.0 (2006):

steak
    n 1: a slice of meat cut from the fleshy part of an animal or
         large fish