
c.1330, from O.Fr. glener, from L.L. glennare "make a collection," from Gaulish (cf. O.Ir. do-glinn "he collects, gathers," Celt. glan "clean, pure"). Figurative sense was earlier in Eng. than the literal one of "gather grain left by the reapers" (c.1385). O.E. clæne "clean, pure," from W.Gmc. *klainoz "clear, pure," from PIE base *gel- "to gleam" (cf. Gk. glene "eyeball," O.Ir. gel "bright"). As an adj., replaced in higher senses by clear, pure, but as a verb (c.1450) it has largely usurped what once belonged to cleanse (from O.E. clænsian), which, despite its modern spelling (16c.) retains its M.E. [...]