Real Dictionary

pot roast
variable noun: A pot roast is a piece of meat that is cooked very slowly with a small amount of liquid in a covered pot.

pot roast in American English
meat, usually a large cut of beef, cooked in one piece by braising
noun: a dish of meat, usually brisket of beef or chuck roast, stewed in one piece in a covered pot and served in its own gravy

pot roast in British English
noun: meat, esp beef, that is browned and cooked slowly in a covered pot with very little water, often with vegetables added

pot-roast in British English
to cook (meat, esp beef) slowly in a covered pot