Druid Definition

Origin of Druid

• From French druide, from Old French, via Latin, from Gaulish. The earliest record of the term is reported in Greek as Δρυΐδαι (druidai) (plural), cited in Diogenes Laertius in the 3rd century CE. The native Celtic word for "druid" is first attested in Latin texts as druides (plural) and other texts also employ the form druidae (akin to the Greek form). It is understood that the Latin form is a borrowing from Gaulish. The word is cognate with the later insular Celtic words, Old Irish druí (“druid, sorcerer”) and early Welsh dryw (“seer”). The proto-Celtic word may be *dru-wid-s (literally, "oak-knower"), from Proto-Indo-European *dóru (“tree”) and *weyd- (“to see”).

  From Wiktionary

• From Latin druidēs druids of Celtic origin deru- in Indo-European roots

  From American Heritage Dictionary of the English Language, 5th Edition