Glen·dow·er 
(glĕndou′ər, glĕn-dou-), Owen 1359?-1416?
(glĕndou′ər, glĕn-dou-), Owen 1359?-1416? Welsh rebel who led a revolt against Henry IV (1400), controlled most of Wales, and summoned his own parliament (1405) before being effectively crushed by English forces (1409).