noun, plural Fir·bolgs, (especially collectively) Fir·bolg. Irish Legend.
Examples from the Web for firbolg
A third band, the Firbolg proper, took possession of Munster.
Tradition assigns it to ngus, a Firbolg chief who lived about two thousand years ago.Romantic Ireland; volume 2/2|M.F and B. McM. Mansfield
In each of the three islands are found ancient forts or duns, which are traditionally attributed to the Firbolg or Belgic race.Insula Sanctorum et Doctorum|John Healy
In the dim days of Fomorian and Firbolg, and for ages after, Erin was a land of forests, full of wild cattle and deer and wolves.Ireland, Historic and Picturesque|Charles Johnston