Definition of "porterhouse" [por•ter•house]

• A cut of beef taken from the thick end of the short loin, having a T-bone and a sizable piece of tenderloin. Also called porterhouse steak. (noun)
• Archaic An alehouse or chophouse. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "If you prefer fish — and a fish that looks like a steak — get the monkfish porterhouse, which is wrapped in pancetta that keeps the flesh moist."
• "He ordered the 48-ounce porterhouse, which is a very big, but not gargantuan steak."
• "Tapas-style appetizers are followed by dishes such as porterhouse pork chop in apple sauce or grilled all pasture fed steak."