1. (Peoples) a powerful and warlike tribe of ancient Britain, living chiefly in SE Wales, who fiercely resisted Roman invaders in the 1st century ad.

What Silures means?

: a people of ancient Britain described by Tacitus as occupying chiefly southern Wales.

Why are the Silures a significant tribe?

The Silures fiercely resisted Roman conquest about AD 48, with the assistance of Caratacus, a military leader and prince of the Catuvellauni, who had fled from further east after his own tribe was defeated. ... The Silures were not subdued, however, and waged effective guerrilla warfare against the Roman forces.