eyebright \ˈ ̷ ̷ˌ ̷ ̷\noun (pluraleyebrightsoreyebright) 1.: any of several herbs of the genus Euphrasia (especially E. officinalis of Europe) formerly regarded as a remedy for eye ailments 2. a.: scarlet pimpernel b.: indian tobacco c.: indian pipe d.: germander speedwell e.: a sundew (Drosera rotundifolia) f.: bluet 1c(1)