steak knife

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun A table knife with a sharp, usually serrated steel blade.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun A table knife with a sharp, narrow, and often serrated blade designed for cutting tougher foods such as cooked meats.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun a sharp table knife used in eating steak