德鲁伊包含两种意思，分别是德鲁伊（英语：druid）以及德鲁伊教（Druidism）。

A druid (Old Irish:druí; Welsh:derwydd) was a member of the educated, professional class among the Celtic peoples of Gaul, Britain, Ireland, and possibly elsewhere during the Iron Age. The druid class included law-speakers, poets and doctors, among other learned professions, although the best known among the druids were the religious leaders.