From WordNet (r) 2.0 (August 2003) [wn]:
Gaul
n 1: a person of French descent [syn: frog, Gaul]
2: a Celt of ancient Gaul [syn: Gaul]
3: an ancient region of western Europe that included what is
now northern Italy and France and Belgium and part of
Germany and the Netherlands [syn: Gaul, Gallia]
From The Collaborative International Dictionary of English v.0.48 [gcide]:
Gaul \Gaul\, n. [F. Gaule, fr. L. Gallia, fr. Gallus a Gaul.]
1. The Anglicized form of Gallia, which in the time of the
Romans included France and Upper Italy (Transalpine and
Cisalpine Gaul).
[1913 Webster]
2. A native or inhabitant of Gaul.
[1913 Webster]