señora

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

• noun Used as a courtesy title before the surname or full name of a married woman in a Spanish-speaking area.
• noun Used as a form of polite address for a woman in a Spanish-speaking area.
• noun A Spanish or Spanish-speaking woman.

from The Century Dictionary.

• noun A lady; in address, madam; as a title, Mrs.: the feminine of señor: in Spanish use.

from the GNU version of the Collaborative International Dictionary of English.

• noun A Spanish title of courtesy given to a lady; Mrs.; Madam; also, a lady.

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

• noun a Spanish title or form of address for a married woman; similar to the English `Mrs' or `madam'