noun.
A district lying outside the original city limits of a French-speaking city or a city with a French heritage.
The Century Dictionary and Cyclopedia
noun.
A suburb, especially a part of a French city immediately beyond its walls; also, in many cases, a quarter formerly so situated, but now within the limits of a city: as, the Faubourg St. Germain, Faubourg St. Antoine, etc., of Paris.
the GNU version of the Collaborative International Dictionary of English
noun.
A suburb of a French city; also, a district now within a city, but formerly without its walls.