From The Collaborative International Dictionary of English v.0.48 [gcide]: Visigoth \Vis"i*goth\, n. [L. Visegothae, pl. Cf. West, and Goth.] One of the West Goths. See the Note under Goth. -- Vis`i*goth"ic, a. [1913 Webster]
From WordNet (r) 3.0 (2006) [wn]:
Visigoth
n 1: a member of the western group of Goths who sacked Rome and
created a kingdom in present-day Spain and southern France