brown sauce

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

• noun A sauce made from butter and flour browned together and stock.

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

• noun UK A sauce made by the addition of stock to a heated and browned mixture of butter and flour.
• noun UK Any of many brands of bottled sauce based on malt vinegar, fruit and spices.

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

• noun bouillon or beef stock thickened with butter and flour roux and variously seasoned with herbs or Worcestershire etc.
• noun a sauce based on soy sauce