"gleam of sunlight," 1650s, probably from a Scandinavian dialectal word, cf. Swedish dialectal glena, Danish dialectal glene "clear patch of sky."
Online Etymology Dictionary, © 2010 Douglas Harper
Examples from the Web for gleen
The message came from a transcript of micro-cassettes recovered from private investigator Gleen Mulcaire's home.Prince Harry Drunk-Dialed Chelsy
March 18, 2014
General Gleen was taken prisoner, and Turenne's troops, descending the hill, took the village in flank.
De Gramont was exchanged for Gleen, and he and Turenne took counsel as to the course that had best be pursued.